Đăng ký Đăng nhập

Tài liệu Dc ups

.PDF
390
103
136

Mô tả:

OPERATION & MAINTENANCE DOCUMENTATION GT 11 DC & UPS SYSTEM Owner’s Consultants Owner ESB International PETRO VIETNAM PECC2 Employer’s Consultant Employer VIETNAM MACHINERY ERECTION CORPORATION - Power Island Contractor ALSTOM (Switzerland) Ltd. Project NHON TRACH 1 CCPP, VIETNAM ALSTOM-Doc.-Nr. NHT/11/G/BR_BT-----/MM/070 We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden. © STATRON 2003 Statron AG · Industrie Nord · CH-5506 Mägenwil · TEL. ++41 62 887 4 887 · FAX ++41 62 887 4 888 · [email protected] Rev. Description Date Issued Checked Approved Page / of 0 Emission 17.07.2007 J.Hunger E.Bieri J.Hunger 1/2 M311540-11-2 (1) Chap. Document Nr. Description 1 M640004-E Erection, Assembly, Shipping and Handling Instructions Single line & Layout of Equipment A311540-010 NHT/00/G/BR_BT-----/WD/101 M311540-01-1 Cable List DC&UPS System 2 M311540-21 C69BA2F0001AA000 00-307439 7140203191_install 7140203051_commiss 7140203021_operating GroE_en0107 Battery Sizing Data Battery Rack Drawing Battery Wiring Diagram Battery Installation-Manual Battery Commissioning-Manual Battery Operating-Manual Battery Data Sheet 3 S311540-110 NHT/11/G/BT--------/WD/102 S311540-111 NHT/11/G/BT--------/WD/103 Set of Drawings & Partslist (BTL10 ) S311540-120 NHT/11/G/BR--------/WD/102 S311540-121 NHT/11/G/BR--------/WD/103 Set of Drawings & Partslist (BRU10, BRA10/20) S311540-130 NHT/11/G/BT--------/WD/105 S311540-131 NHT/11/G/BT--------/WD/106 S311540-132 NHT/11/G/BT--------/WD/107 Set of Drawings & Partslist (BUA10) 4 5 Set of Drawings & Partslist (BTM10 ) (Dimensions/Layout/Terminal list/Wiring Diagrams) Set of Drawings & Partslist (BRU20, BRB10/20) Set of Drawings & Partslist (BUB10) Set of Drawings & Partslist (BUC10/20) (Dimensions/Layout/Terminal list/Wiring Diagrams) 6 T311540-100 NHT/11/G/BR_BT-----/EM/090 Factory Routine Test Reports 7 M311540-11 System Description 8 M621005E Battery Charger O&M M311540-13 Technical Data Battery Charger M653006E UPS / Inverter O&M M311540-16 Technical Data UPS / Inverter M311540-17 220V DC Distribution O&M 9 10 page 2 (2) M311540-11-2 STATRON AG, Switzerland Describtion: Type DC & UPS Revision: B Doc.-type: Prepared: Checked: Approved: J.Hunger H.Würsch J.Hunger Valid for: File no.: MANUAL Replaces: IS2 Cabinets M640004-E Language: Page: E Order-nbr.: general 1/13 Data set: 02.05.2007 ERECTION, ASSEMBLY, SHIPPING & HANDLING INSTRUCTIONS for DC and UPS System (in IS2 cabinets) Q:\MANUALS\Allgemein\640004\M640004-E.doc We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly forbidden.  STATRON 2007 Statron AG · Industrie Nord · CH-5506 Mägenwil · TEL. ++41 62 887 4 887 · FAX ++41 62 887 4 888 (3) Page: 2/13 This side intentionally left blank (4) File no.: M640004-E Page: 3/13 File no.: M640004-E Table of Contents 1 HANDLING........................................................................................................................................................4 1.1 1.2 1.3 2. ERECTION ........................................................................................................................................................7 2.1 2.2 2.3 2.3.1 2.4 2.5 3. EQUIPMENT DESCRIPTION ...........................................................................................................................4 INTERMEDIATE STORAGE ............................................................................................................................4 TRANSPORT .................................................................................................................................................5 CHECKS ON DELIVERY .................................................................................................................................7 CONSTRUCTIONAL REQUIREMENTS .............................................................................................................7 ERECTION AND CONNECTION OF THE CUBICLES ...........................................................................................8 Additional informations for switchgear positioning ..............................................................................9 FASTENING METHODS TO FOUNDATION .......................................................................................................9 DRIP PROTECTION ROOF (OPTIONAL) .........................................................................................................12 CABLE CONNECTIONS, WIRING .............................................................................................................13 (5) Page: File no.: 4/13 1 M640004-E HANDLING 1.1 Equipment Description General The critical source panels, i.e. chargers, inverters and distribution boards are built-up of single cabinets in fixed technique. The basic elements of the frames are Csections of 2mm thick sheet steel with holes at 25mm intervals. The parts of the frame are secured with threadforming screws and require no maintenance. The single cabinets are separated by separation walls. The cabinets are equipped with rear plates, hinged front doors and end plates. 1.2 Intermediate Storage The nature and duration of intermediate storage are dependent on the type of packaging. Cubicles in standard packaging Cubicles with export/ seaworthy packaging Store indoors after arrival where no condensation can occur. Unpack immediately. Open the doors for several hours to acclimatize the equipment. Cover the cubicles with plastic sheeting for any subsequent storage periods. Check regularly for condensation forming under the sheeting until the start of installation. • Moisture protection is only guaranteed if the packaging is undamaged. • Possibility of intermediate storage outdoors. • Storage period of maximum 12 months if wrapped in heat sealed PE sheeting and the packaging is undamaged. • When the storage period is exceeded, the drying agent must be replaced and the plastic sheeting has to be resealed. If condensation occured don't commission the unit until it is completely dry. Open the doors for several hours to acclimatize the unit or run the cubicle heaters for 2-3 days. (6) Page: File no.: 5/13 1.3 M640004-E Transport The unpacked cabinets can be transported by crane or fork-lift snuck. By fork-lift truck Switchgear cubicles have to be transported only in the vertical position. Tilting and canting must be avoided. Cubicles may easily tip over when transported with a hand-pulled truck. Therefore the distance between the wooden cross beam or the pallet and the underground should not be more than 3 mm. (7) Page: 6/13 By crane (8) File no.: M640004-E Page: 7/13 File no.: M640004-E 2. ERECTION 2.1 Checks on delivery Check the consignment on arrival at site for: • • • • Completeness transport damage (if found, determine extent, cause and originator). When damage is detected it must be proceeded as follows: Immediately write down visible damage in the consignment note. Report hidden damage in writing to the relevant forwarding agent within one week. When certification is missing or a claim has not been made, the manufacturer can disclaim all liability. 2.2 Constructional requirements To prevent damage being caused by moisture and dirt the following tasks (only examples) must be carried out before erection of the switchgear: • • • • • Walls and ceilings DRY, painting completed. Doors and windows installed. Openings in the floor, wall and ceiling for cables, conductors pipes, bars and ventilation in accordance with the construction drawings provided. Supporting brackets, beams, enclosures and foundation frames assembled and painted. If necessary, assemble braces appropriate to the basic dimensions of the switchgear installation with cross struts corresponding to the cubicle divisions. Suitable indoor conditions must be maintained. Adequate lighting as well as free access to the switchgear rooms must be provided. Excessive temperature fluctuations together with high humidity should be prevented by heating the room. Condensation should also be prevented. (9) Page: 8/13 File no.: M640004-E 2.3 Erection and connection of the cubicles The erection of the cubicles should be carried out, as described the following: The shipping units which are to be erected in one row have to be aligned accurately and checked that they are vertical. Doors and panels must not be twisted or stressed. The erection can start at the left or at the right. The frames of the shipping units have to be screwed together. The vertical sections are already fitted on the front and rear with special nuts. Note: for protection class IP5x and higher or IPx1 and higher the rubber seal has to be be attached between the frames. Additionally to the vertical sections or if the access to the joints in the vertical sections is obstructed, the bottom sections can be screwed together using the frame connectors which are enclosed . (10) Page: 9/13 File no.: M640004-E The protective conductor (PE or PEN) is to be connected to the PE/PEN bar. Additional connections to the central earthing system can be made at any point of the perforated PE/PEN bar. Local regulations must be complied with. The lifting angles may be removed and afterwards the fastening holes have to be plugged with attached plug. 2.3.1 Additional informations for switchgear positioning The area around the cubicles to be left clear should be at least 80 mm. To be able to mount the last (right) cubicle, the distance between the end cubicle and the (right) wall must be at least 150 mm. In case of left-mounted doors, the minimal distance between the (left) wall and the (left) end cubicle should be also 150 mm, such that the door can be opened in an angle of more than 90°. The distance from the upper edge of the (highest) cubicle to the ceiling should be at least 500 mm for cubicles with ventilation grids on the top . 2.4 Fastening methods to foundation The erection of switchgears having the cable entries at the bottom requires a foundation with an opening, a cable duct or a special base frame. • • The cubicles should preferably be erected on a base frame which is either embedded in the concrete floor or rests as false floor on supports. When erecting the base frame the following must be observed: • The base frame should be aligned and checked under the supervision of a suppliers fitter. • The horizontal tolerance of the frame must not exceed +1 mm over a length of 1 m. This is to be ensured by using suitable levelling devices (e.g. spirit level, 1 m long surveyors rod). (11) Page: 10/13 • M640004-E The frame must not ondulate ( • File no.: 2/1000 according to DIN ISO 1101) The levelling of base frames can be performed e.g. with PRESTOJACK levelling spindles. During erection the switchgear is welded or screwed to the base frame. (12) • The length of the weld seams at the front and rear of each cubicle should not be less than 20 mm. All weldings must be protected against corrosion by a coat of paint (e.g. zinc paint). • The screwed connection is carried out through the transverse section. The mounting holes required for metal straddling dowels M 10 must be drilled during erection. Page: 11/13 File no.: M640004-E When false floors are used, notice that: • Tolerances are the same as for the base frame. • The subsoil must be fimm, so that the tolerances are not exceeded by settling of the soil (especially when using insulation layers and adhesives). • The false floor has to have a carrying capacity of p=20 kN/m2 (Compression load from top to bottom). During erection the switchgear is welded or screwed to the false floor. • The length of the weld seams at the front and rear of each cubicle should not be less than 20 mm. Then a reliable earth connection is provided. All weldings must be protected against corrosion by a coat of paint (e.g. zinc paint). • If welding is not possible, the switchgear can be bolted to the false floor. The necessary mounting holes should be drilled on site. Care should be taken to ensure that the base sections of each cubicle rests evenly on the supports. Taking into account the bending radius of the cables and adequate accessibility, a minimum floor height of 500 mm is recommended. (13) Page: 12/13 2.5 File no.: M640004-E Drip protection roof (optional) A drip proof top is only recommended if tubes containing water or other solvents are placed above the cubicles. The top shall be installed only after the cubicles are placed and screwed together. Mount the lifting bolts (or tubes) and install the tops. Note: for protection degree >IP40 the delivered rubber foam gasket must be applied between the cabinets (see chapter 2.3) FRONT VIEW (14) Page: 13/13 3. File no.: M640004-E CABLE CONNECTIONS, WIRING • Power and control cables are to be attached to the cable mounting rails in the cable compartment. • Power and control cables are to be stripped off their jacket below the connections of each module. • Before fastening the cables at the power terminals they must be supported or bended so that no tension or pressure is exerted on the cable connection unit. • Control cables with individual conductors to be connected to several different terminal blocks are to be stripped within the cable compartment. Prior to fastening any feeder-, load- or control cable the protective conductor (PE or PEN) must be connected to the cabinet ground bar. The continuous connection of the protective conductor circuits to inactive metal parts of the building (in accordance with IEC 60439 or DIN VDE 0100 Part 540) is to be carried out according to the conditions at the erection site. The terminal list is part of the Set of Drawings , for each cabinet, on the pages with group nr. ..-040 ... 099. (15) © Statron AG, Industrie Nord, CH-5506 Mägenwil Alle Rechte vorbehalten. Tous droits réservés / All rights reserved TEL.: +41 (0)62 887 4 887 FAX: +41 (0)62 887 4 888 1 2 3 4 5 Seite Titel: last Rev. modified pages page title: letzte Rev. geänderte Seiten 000 COVER SHEET / SUMMARY 1 X 001 SYMBOLS & LETTERS INDEX A 2 010 SINGLE LINE 220V DC CHARGER + MAIN DCDB 3 X 011 SINGLE LINE 220V DC SUB-DISTRIBUTION X 4 SINGLE LINE 230V AC UPS + DISTRIBUTION 012 X 5 020 CONTAINER LAYOUT 6 PANEL DIMENSIONS 1 021 7 022 PANEL DIMENSIONS 2 8 FOOTPRINT OF CABINETS 023 9 10 B 11 12 13 14 15 16 17 18 19 C 20 21 22 23 Owner 24 25 26 27 28 D 29 EPC Contractor 30 31 32 33 34 35 36 Subcontractor 37 E 38 39 Project 40 41 42 43 Owner's Identification No. 44 45 46 F -GT / DC UPS SYSTEM 6 7 8 DC / UPS SYSTEM A ..BTL10, ..BTM10, ..BTA10GS100, ..BTB10GS100 ..BTA10, ..BTB10 ..BUA10, ..BUB10, ..BUC10, ..BUC20 ..BRU10, ..BRA10, ..BRA20 ..BRU20, ..BRB10, ..BRB20 NHON TRACH 1 CCPP,VIETNAM Rev. D ORIGINAL (16) 24.07.07 J.Hunger P.Zeller J.Hunger 08.03.07 ZELLER HUNGER MOUTRAGI 1xKA13E2-2 DATUM/DATE GEZ./DRAWN GEP./APPR. FREIG/REL. -- 1 2 3 11/12 SWITZERLAND -- -- 4 C Owner's Consultants D Issued by E EPC Contractor Identification No. ALSTOM Document code NHT/00/G/BR_BT-----/WD/101 001 AUFTR.-NR : 311540 -CY DOC-Nr. SYSTEM OVERVIEW COVER SHEET / SUMMARY 5 B UNIT = + SEITE/PAGE VON/OF H - A311540 - 010 - 000 6 7 9 8 F © Statron AG, Industrie Nord, CH-5506 Mägenwil TEL.: +41 (0)62 887 4 887 FAX: +41 (0)62 887 4 888 1 2 SYMBOL/LETTER L1 L2 L3 PHASE SEQ PHI/FREQ U high voltage low & high voltage EF earth fault printed circuit board (sample) 12 3 4 56 -A35 3 printed circuit board, monitoring relay aux. power supply A A DESCRIPTION Alle Rechte vorbehalten. Tous droits réservés / All rights reserved 8 transformers voltage transformer A measuring equipment A F auto-transformer indicating instrument V = voltmeter A = ammeter F = frequency meter auto-transformer with voltage regulation current transformer Q switching devices for power circuits B U converter battery, accumulator B signal lamp with LED (light emitting diode) hygrostat (humidity sensor, can be combined with temperature) 2 rH 1 C signal lamp with bulb / cabinet light K relays, contactors fused switch-disconnector relay coil general symbol relay coil time delay function D t 9 4-20mA + 10 11 12 +15 -15 O/P R time delay relays left: defined function right: multi function zener diode breakdown diode IGBT insulated-gate bipolar transistor terminals, plugs, sockets terminal, screw-/bolt-terminal terminal, wire-wrap / termipoint plug / socket terminal plug socket break contact left: delayed when activated right: delayed when de-activated cable adapter (ribbon cable to single wire) M1 switch with automatic return operated by pushing switch with non-automatic return operated by pushing switch with non-automatic return operated by turning key operated switch (can be combined with the above options) make contact left: delayed when de-activated right: delayed when activated E switching devices for control circuits 1-20 S change over contact break before make cabinet heater F X CN1 fan Z filters, limiters varistor voltage depend resistor transient suppressor R-C unit radio interference filter EMI filter 000 NHON TRACH 1 CCPP,VIETNAM Rev. D ORIGINAL 24.07.07 J.Hunger P.Zeller J.Hunger 08.03.07 ZELLER HUNGER MOUTRAGI 1xKA13E2-2 DATUM/DATE GEZ./DRAWN GEP./APPR. FREIG/REL. -- 1 2 3 GT / DC UPS SYSTEM 11/12 SWITZERLAND -- -- 4 D thyristor resistors shunt resistor with separate current and voltage terminals break contact LEM transmitter Hall effect current transmitter diode resistor, general make contact C semiconductors miscellaneous M E measuring transmitter with galvanic isolation between input, output and aux. voltage supply V left: resistor with adjustable tap right: potentiometer E 3 2 230VAC 1 relay coil bistable (remanence) relay delay devices F M8742 7+ 0..300VDC 8- mcb, miniature circuit breaker with thermal and magnetic release 1-pole / 2-pole / 3-pole (ppower circuits) key lockable handle for circuit breakers and switch-disconnectors non polarized capacitor for AC or DC voltage t converter left: AC to DC (rectifier/charger) right: DC to AC (inverter) circuit breaker MCCB moulded case circuit breaker general / detailed symbol capacitors polarized capacitor for DC voltage D switch-disconnector (on load isolating switch) - signalling device M H (shown in low temp status) C converter left: AC to AC right: DC to DC + thermostat, thermo contact 3 disconnector (isolator) thermostat, thermo contact SYSTEM OVERVIEW SYMBOLS & LETTERS INDEX 5 6 AUFTR.-NR : 311540 -CY DOC-Nr. UNIT 010 = + SEITE/PAGE VON/OF H - A311540 - 010 - 001 7 9 8 (17) F © Statron AG, Industrie Nord, CH-5506 Mägenwil TEL.: +41 (0)62 887 4 887 FAX: +41 (0)62 887 4 888 1 2 Alle Rechte vorbehalten. Tous droits réservés / All rights reserved 3 4 ..BMA 5 6 7 8 ..BMA 3 x 400V, 50Hz A A 3x100A 3P BTL10 GS100 3x100A 3P BTM10 GS100 230VAC 230VAC -X90 BATTERY 220V 108 x GroE 425 425Ah/10h -X01 -X90 -X01 H BTL10 -Q1 80A 80A -Q1 BATTERY 220V 108 x GroE 425 425Ah/10h H BTM10 B B BTA10 CHARGER 220BDT200 220V/166A CHARGER DISTURBED -X10 CHARGER FAILURE -X10 CHARGER 220BDT200 220V/166A -X11 CHARGER FAILURE -X11 160A C A V V A NOTE: BUC00GS100 closed only when one of Q2 in BTL or BTM is open! -Q2 U/I/F DIGITAL C -Q2 BTL00 GS100 -Q9 ±300A ±300A -X04 -X04 A + -X14 160A + U/I/F DIGITAL 300V 200A BATTERY FAILURE 200A 300V BATTERY FAILURE -X13 BTB10 CHARGER DISTURBED A 315A -X15 -X15 DIST FAILURE -X90 -X02b 315A BUA10 GS100 BUB10 GS100 BTB10 GS100 27 59 220V DC BUA10 BUB10 D DIST FAILURE A 250A 250A A 300V V -X15 -F10 250A 250A BTA10 GS100 D 230VAC H 315A 230VAC H -X90 -F10 -X02b V 300V 59 27 220V DC ACT.VAL. VOLTAGE ACT.VAL. VOLTAGE TO INVERTER BRU10 -X02 -X02 -X02 NHON TRACH 1 CCPP,VIETNAM 24.07.07 J.Hunger P.Zeller J.Hunger 08.03.07 ZELLER HUNGER MOUTRAGI 1xKA13E2-2 DATUM/DATE GEZ./DRAWN GEP./APPR. FREIG/REL. -- 1 -X02 TO DISTRIBUTION BUC10 001 (18) CF BUC10 GS101 2 3 27 UNDERVOLTAGE RELAY 59 OVERVOLTAGE RELAY SWITZERLAND -- 4 -X02 BRU20 GS101 SYSTEM OVERVIEW SINGLE LINE DIAGRAM CHARGER 5 6 E -X02c TO INVERTER BRU20 TO DISTRIBUTION BUC10 GT / DC UPS SYSTEM 11/12 -- -X02 BUC10 GS102 63A 63A -X02c CF 200A BRU10 GS101 E Rev. D ORIGINAL -X16 -X01 200A -X01 F -X16 -X16 011 AUFTR.-NR : 311540 -CY DOC-Nr. UNIT =BTL/BUA/BTM/BUB + SEITE/PAGE VON/OF H - A311540 - 010 - 010 7 9 8 F © Statron AG, Industrie Nord, CH-5506 Mägenwil TEL.: +41 (0)62 887 4 887 FAX: +41 (0)62 887 4 888 1 2 Alle Rechte vorbehalten. Tous droits réservés / All rights reserved 3 4 5 6 7 8 A A FROM DISTRIBUTION BUA10 BUC10GS101 FROM DISTRIBUTION BUB10 BUC10GS102 B B 230VAC -X01a -X17 -X17 DIST FAILURE -X01b A A 200A 200A -X90 BUC10 H 300V V C C 64 27 59 BUC20 MO BUC20 GS101 2,3A ROBA HTCT323470 D MO 46/15A ELOP HTCT322923 MO 16A JOP 2 HTCT323471 16A JOP 1 HTCT323471 220V DC MO CF CF D -X02 -X02 -X02 -X02 E F E 27 UNDERVOLTAGE RELAY 59 OVERVOLTAGE RELAY 64 EARTH FAULT RELAY 010 012 NHON TRACH 1 CCPP,VIETNAM Rev. D ORIGINAL 24.07.07 J.Hunger P.Zeller J.Hunger 08.03.07 ZELLER HUNGER MOUTRAGI 1xKA13E2-2 DATUM/DATE GEZ./DRAWN GEP./APPR. FREIG/REL. -- 1 2 3 GT / DC UPS SYSTEM 11/12 SWITZERLAND -- -- 4 SYSTEM OVERVIEW SINGLE LINE DIAGRAM 220VDC 5 6 AUFTR.-NR : 311540 -CY DOC-Nr. UNIT =BUC10/BUC20 + SEITE/PAGE VON/OF H - A311540 - 010 - 011 7 9 8 (19) F © Statron AG, Industrie Nord, CH-5506 Mägenwil TEL.: +41 (0)62 887 4 887 FAX: +41 (0)62 887 4 888 1 2 Alle Rechte vorbehalten. Tous droits réservés / All rights reserved 3 FROM BUA10 BRU10GS101 220V DC A 4 5 6 FROM BUB10 BRU20GS101 220V DC 3x400/230VAC, 50Hz ..BJA 50A 2P 7 3x400/230VAC, 50Hz ..BJA A =BRU10GS103 230VAC -X90 -X01a -X01a -X01c H BRU10 B -X90 -X01c H 400V 230V BRU20 INVERTER IDS 020 2V2 15kVA DISTURBED B V 300V -X41 FAILURE -X41 INVERTER IDS 020 2V2 15kVA DISTURBED 300V FAILURE U/I/F DIGITAL Hz V A C MANUAL BYPASS SWITCH 100A 47-53Hz MANUAL BYPASS SWITCH 300V U/I/F DIGITAL 100A 300V C 47-53Hz 15kVA -Q11 V -X40 400V 230V 15kVA -Q11 -X40 =BRU20GS103 50A 2P 230VAC 8 Hz V A D D Neutral earthed Neutral earthed BRA20 BRB20 BUSBAR DISTURBED -X45 -X45 ACT. VAL. VOLTAGE BUSBAR DISTURBED -X47 ACT. VAL. VOLTAGE -X47 -X46 BUSBAR DISTURBED -X46 ~ ACT. VAL. VOLTAGE ACT. VAL. VOLTAGE ~ 230VAC ~ 230VAC BRA10 BRB10 CF -X02 E CF -X02 -X02 -X02 -X02 LOAD max. 12kVA, p.f. 0.8 ind. F -X48 BUSBAR DISTURBED ~ E -X48 -X02 -X02 -X02 LOAD max. 12kVA, p.f. 0.8 ind. 011 020 NHON TRACH 1 CCPP,VIETNAM Rev. D ORIGINAL (20) 24.07.07 J.Hunger P.Zeller J.Hunger 08.03.07 ZELLER HUNGER MOU TRAGI 1xKA13E2-2 DATUM/DATE GEZ./DRAWN GEP./APPR. FREIG/REL. -- 1 2 3 GT / DC UPS SYSTEM 11/12 SWITZERLAND -- -- 4 SYSTEM OVERVIEW SINGLE LINE DIAGRAM 230VAC 5 6 AUFTR.-NR : 311540 -CY DOC-Nr. UNIT =BRU10/BRA10/BRU20/BRB10 + SEITE/PAGE VON/OF H - A311540 - 010 - 012 7 9 8 F
- Xem thêm -

Thư viện tài liệu trực tuyến
Hỗ trợ
hotro_xemtailieu
Mạng xã hội
Copyright © 2023 Xemtailieu - Website đang trong thời gian thử nghiệm, chờ xin giấy phép của Bộ TT & TT
thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi tài liệu như luận văn đồ án, giáo trình, đề thi, .v.v...Kho tri thức trực tuyến.
Xemtailieu luôn tôn trọng quyền tác giả và thực hiện nghiêm túc gỡ bỏ các tài liệu vi phạm.