Rơ Le Điện Bảo Vệ Schrack Technik Tại Việt Nam

Liên hệ

173/13 Đường Số 28, Phường 6, Gò Vấp, Hồ Chí Minh, Việt Nam

Chúng tôi, tự hào là nhà cung cấp các dòng sản phẩm Schrack, phục vụ cho các nghành Công Nghiệp tại thị trường Việt Nam.
Các dòng sản phẩm của Schrack:
– Relay - rơ le - đế rơ le schrack
– Bộ nguồn
– Máy biến dòng
– Thiết bị đo lường

Liên hệ với chúng tôi:

CÔNG TY TNHH TỰ ĐỘNG HÓA HOÀNG PHÚC

Địa chỉ: 173/13 Đường Số 28, Phường 6, Quận Gò Vấp, TP. HCM

Điện thoại: 028 2245 3039 | Fax: 028 2245 3039

Email: phung@hoangphucvn.com

Phone: 0933.502.539

Tập đoàn Schrack Technik có trụ sở tại Vienna, Áo, và chuyên về các sản phẩm và giải pháp cho sức mạnh và công nghệ thông tin. Công ty cung cấp cho khách hàng của mình một loạt các sản phẩm để phân phối năng lượng an toàn, thuận tiện và tiết kiệm và sử dụng năng lượng. Kể từ khi mua lại Highspeed Cabling, công ty cũng chuyên về các sản phẩm và giải pháp cho các mạng dữ liệu. Quản lý điều hành bao gồm Wilhelm Großeibl, Viktor Eßbüchl và Franz Gletthofer. Wilhelm Großeibl cũng là Giám đốc điều hành.

Các dòng model của Schrack:

Relay Schrack PT570548
Đế Relay Schrack YPT78704
Article #: LQ611230–
LQ611230–

Remote switch, 1 N/O, 230VAC
Article #: YPT78704–
YPT78704–

Socket for PT relays with screw type terminals 14-pole
Article #: PT570730–
PT570730–

Plug-in Relay 14 pin 4 C/O 230VAC 6A, series PT
Article #: ZR5MF011–
ZR5MF011–

Timer multifunction 12-240V AC/DC, 1CO, 8A/250V
Article #: PT570024–
PT570024–

Plug-in Relay 14 pin 4 C/O 24VDC 6A, series PT
Article #: YRT78626–
YRT78626–

Screw Type terminal socket I/O with pinning 5mm
Article #: RT78725—
RT78725—

Socket with screw terminals for PCB Relays with pinning 5mm
Article #: RT424024–
RT424024–

PCB Relay 2 C/O 24VDC 8A pinning 5.0
Article #: RT424730–
RT424730–

PCB Relay 2 C/O 230VAC 8A pinning 5.0
Article #: MT78740—
MT78740—

11-pole socket with screw connection for 3-pole MT-relays
Article #: PT570524–
PT570524–

Plug-in Relay 14 oin 4 C/O 24VAC 6A, series PT
Article #: YMR78700–
YMR78700–

11-pole socket with screw connection for 3-pole MT-relays
Article #: PT570012–
PT570012–

Plug-in Relay 14 pin 4 C/O 12VDC 6A, series PT
Article #: YRS78704–
YRS78704–

Socket, screw type terminals, 14 pole, S-Relay series 4
Article #: XT484LC4–
XT484LC4–

Plug-in Relay 8 pin 2 C/O 24VDC 16A, with LED and PD
Article #: ESM055010-
ESM055010-

MD 180i/R UP IP20 motion detector (relay version)
Article #: UR5P3011–
UR5P3011–

Phase monitoring relay, 1CO
Article #: MT326230–
MT326230–

Plug-in Relay 11 pin 3 C/O 230VAC 10A, series MT
Article #: LQ540000–
LQ540000–

STELLA-remote-switch 1NO, 230V with additional time-function
Article #: ZR5ER011–
ZR5ER011–

Timer duo function ON/OFF-delay 24-240V AC/DC, 1CO, 8A/250V
Article #: PT570512–
PT570512–

Plug-in Relay 14 pin 4 C/O 12VAC 6A, series PT
Article #: UR5U3011–
UR5U3011–

Voltage monitoring relay 3-phase, adjustable 160-240V, 1CO
Article #: YMFDG230–
YMFDG230–

Protection diode module 6-230V DC, A1+, EM09
Article #: RT424012–
RT424012–

PCB Relay 2 C/O 12VDC 8A pinning 5.0
Article #: ZR5E0011–
ZR5E0011–

Timer single function ON-delay 24-240V AC/DC, 1CO, 8A/250V
Article #: YMLRD024-A
YMLRD024-A

LED module, red, 6-24V DC, A1+, EM18
Article #: RT424524–
RT424524–

PCB Relay 2 C/O 24VAC 8A pinning 5.0
Article #: XT484T30–
XT484T30–

Plug-in Relay 8 pin 2 C/O 230VAC 16A, with LED
Article #: ZR5R0011–
ZR5R0011–

Timer single function OFF-delay 24-240V AC/DC, 1CO, 8A/250V
Article #: MT321024–
MT321024–

Plug-in Relay 11 pin 3 C/O 24VDC 10A, series MT
Article #: BZ651000–
BZ651000–

Modular relay, 1 CO, 24-240V AC/DC
Article #: YPT78702–
YPT78702–

Socket for PT relays with screw type terminals 8 pole
Article #: MTMT00A0–
MTMT00A0–

Protection diode module 1N4007 for socket MT78740
Article #: RT17017—
RT17017—

Retaining clip for RT-relays
Article #: URAP3011–
URAP3011–

Phase monitoring relay AMPARO, 24V-AC/DC/230V-AC , 1CO, 5A
Article #: RT314024–
RT314024–

PCB Relay 1 C/O 24VDC 16A pinning 5.0
Article #: RT314730–
RT314730–

PCB Relay 1 C/O 230VAC 16A pinning 5.0
Article #: MT328230–
MT328230–

Plug-in Relay 11 pin 3 C/O 230VAC 10A with LED, series MT
Article #: YPT78110–
YPT78110–

Socket for PT Relays screw type terminals 14-pole + Diode
Article #: YMLGD024–
YMLGD024–

LED module, green 6-24V DC with protection diode, A1+, EM12
Article #: ZR5B0011–
ZR5B0011–

Timer flashing 12-240V AC/DC, 1CO, 8A/250V
Article #: SP120000–
SP120000–

Trafo 10VA (for 1224 switching relay/Begeh access system)
Article #: ZRAMF011–
ZRAMF011–

Timer multifunction AMPARO, 24V-AC/DC + 230V-AC, 1 CO, 5A
Article #: LA300108K3
LA300108K3

Motor prot. relay 2,7-4A U12/16E…K3 Manual-Reset
Article #: RS410730–
RS410730–

Plug-in Relay 14 pin 4 C/O 6A 230VAC, S-Relay Serie 4
Article #: UR5L1021–
UR5L1021–

Level monitoring relay input 230VAC, 1CO
Article #: RS410024–
RS410024–

Plug-in Relay 14 pin 4 C/O 6A 24VDC, S-Relay Serie 4
Article #: UR6P3052–
UR6P3052–

Phase monitoring relay, 3-phase, 2 CO
Article #: LA300107K3
LA300107K3

Motor prot. relay 1,8-2,7A U12/16E…K3 Manual-Reset
Article #: LA300109K3
LA300109K3

Motor prot. relay 4-6A U12/16E…K3 Manual-Reset
Article #: PT270730–
PT270730–

Plug-in Relay 8 pin 2 C/O 230VAC 12A, series PT
Article #: RS410T30–
RS410T30–

Plug-in Relay 14 pin 4 C/O 6A 230VAC, LED, S-Relay Serie 4
Article #: RT314012–
RT314012–

PCB Relay 1 C/O 12VDC 16A pinning 5.0
Article #: YRT16040–
YRT16040–

Marking tag for YRT-socket
Article #: PT270024–
PT270024–

Plug-in Relay 8 pin 2 C/O 24VDC 12A, series PT
Article #: UR5U3N11–
UR5U3N11–

Voltage monitoring relay 3-ph against N, fixed Us=195.5V
Article #: XT17017—
XT17017—

Retaining clip for XT and RP relays
Article #: PT7874P—
PT7874P—

Plug-in socket 14-pole with spring clamp
Article #: MT323024–
MT323024–

Plug-in Relay 11 pin 3 C/O 24VDC 10A with LED, series MT
Article #: BZ65

Plug-in Relay 11 pin 3 C/O 220VDC 10A with LED, series MT
Article #: ZR5MF025–
ZR5MF025–

Timer multifunction 12-240V AC/DC, 2CO, 8A/250V
Article #: UR3I2010–
UR3I2010–

Mains Decoup. NAK16/3 16A/230V
Article #: UR6R1052–
UR6R1052–

Thermistor monitoring relay, input 230V-AC, 2 CO
Article #: RT7872P—
RT7872P—

Socket with spring clamps for PCB relays with pinning 5mm
Article #: YPT78703–
YPT78703–

Socket for PT relays with screw type terminals 11 pole
Article #: PT570220–
PT570220–

Plug-in Relay 14 pin 4 C/O 220VDC 6A, series PT
Article #: PT570L24–
PT570L24–

Plug-in Relay 14 pin 4 C/O 24VDC 6A with bipolar LED
Article #: RS410R24–
RS410R24–

Plug-in Relay 14 pin 4 C/O 6A 24VAC, LED, S-Relay Serie 4
Article #: XT484R24–
XT484R24–

Plug-in Relay 8 pin 2 C/O 24VAC 16A, with LED
Article #: RS410524–
RS410524–

Plug-in Relay 14 oin 4 C/O 6A 24VAC, S-Relay Serie 4
Article #: MT326024–
MT326024–

Plug-in Relay 11 pin 3 C/O 24VAC 10A, series MT
Article #: MT226230–
MT226230–

Plug-in Relay 8 pin 2 C/O 230 VAC 10A, series MT
Article #: YMR78701–
YMR78701–

8-pole socket with screw connection for 2-pole MT-relays
Article #: YMRCW230–
YMRCW230–

RC Network module 110-230V AC, EM03
Article #: PT570T30–
PT570T30–

Plug-in Relay 14 pin 4 C/O 230VAC 6A with LED, series PT
Article #: PT370024–
PT370024–

Plug-in Relay 11 pin 3 C/O 24VDC 10A, series PT
Article #: RM78705—
RM78705—

Socket with screw type terminaly black 11-pole
Article #: LA300110K3
LA300110K3

Motor prot. relay 6-9A U12/16E…K3 Manual-Reset
Article #: PT580730–
PT580730–

Plug-in Relay 14 pin 4 C/O 230VAC 6A, gold plated, series PT
Article #: MT321220–
MT321220–

Plug-in Relay 11 pin 3 C/O 220VDC 10A, series MT
Article #: URAU3011–
URAU3011–

Voltage monitoring relay AMPARO 3-p, adjustable 160-240V,1CO
Article #: PT570LC4–
PT570LC4–

Plug-in Relay 14 pin 4 C/O 24VDC 6A with LED and PD
Article #: PT370730–
PT370730–

Plug-in Relay 11 pin 3 C/O 230VAC 10A, series PT
Article #: UR5I1011–
UR5I1011–

Current monitoring relay 1 phase, input 230V, 1CO
Article #: ZR5SD025–
ZR5SD025–

Timer star-delta 12-240V AC, 2CO, 8A
Article #: ST3P3LC4–
ST3P3LC4–

SNR-Package 24VDC screw type terminals
Article #: BZ651230–
BZ651230–

Modular high-inrush-relay series ALEXA, 1 NO, 230V AC
Article #: MT221024–
MT221024–

Plug-in Relay 8 pin 2 C/O 24VDC 10A, series MT
Article #: RT425024–
RT425024–

PCB-Relay 2C/O, 24V-DC, 8A, 5mm-Pinning,htv
Article #: LQ213024–
LQ213024–

Impulse Relay, 24VDC, 1N/O, 10A
Article #: PT570615–
PT570615–

Plug-in Relay 14 pin 4C/O 115VAC 6A, series PT
Article #: ZR4MF025-A
ZR4MF025-A

Timer multifunction 12-240V AC/DC, 2CO, 8A, plug-version
Article #: MT3330C4–
MT3330C4–

Plug-in Relay 11 pin 3 C/O 24VDC 10A, gold plated, LED+PD
Article #: BZ926301–
BZ926301–

Day-/night contactor, 3-pole, 25A
Article #: LST01600–
LST01600–

Thermal Overload Relay 11-16A size 0
Article #: ZRAE0011–
ZRAE0011–

Timer singlefunction ON-delay AMPARO,24VAC/DC, 230VAC,1CO,5A
Article #: LA300106K3
LA300106K3

Motor prot. relay 1,2-1,8A U12/16E…K3 Manual-Reset
Article #: LSTD0200–
LSTD0200–

Thermal Overload Relay 1,4-2,00 A size 00
Article #: LSTD0250–
LSTD0250–

Thermal Overload Relay 1,8-2,5A size 00
Article #: ST3P3TP0–
ST3P3TP0–

SNR-Package 230VAC/DC cage clamp terminals
Article #: SNR03024–
SNR03024–

Slim PCB Relay 1 C/O 24VDC 6A
Article #: MT3230C4–
MT3230C4–

Plug-in Relay 11 pin 3 C/O 24VDC with LED, series MT
Article #: LSTD0630–
LSTD0630–

Thermal Overload Relay 4,5-6,3A size 00
Article #: BZ601000–
BZ601000–

Load shedding relay 6,7-39A 400V
Article #: LSTD0400–
LSTD0400–

Thermal Overload Relay 2,8-4,00 A size 00
Article #: RT33K012–
RT33K012–

PCB Relay 1 NO 12VDC 16A pinning 5.0
Article #: LA300105K3
LA300105K3

Motor prot. relay 0,8-1,2A U12/16E…K3 Manual-Reset
Article #: LSTD0800–
LSTD0800–

Thermal Overload Relay 5,5-8,00 A size 00
Article #: PT580524–
PT580524–

Plug-in Relay 14 pin 4 C/O 24VAC 6A, gold plated, series PT
Article #: EV103041–
EV103041–

Blinds control relay
Article #: RT114024–
RT114024–

PCB Relay 1 C/O 24VDC 12A pinning 3.5
Article #: UR6U3052–
UR6U3052–

Voltage monitoring relay 3-phase, AC/DC, 2 CO
Article #: PT570048–
PT570048–

Plug-in Relay 14 pin 4 C/O 48VDC 6A, series PT
Article #: PT570110–
PT570110–

Plug-in Relay 14 pin 4 C/O 110VDC 6A, series PT
Article #: LSTD1000–
LSTD1000–

Thermal Overload Relay 7,00 -10,00 A size 00
Article #: YMLGA024–
YMLGA024–

LED module, green, 6-24V AC/DC, EM11
Article #: YMLGW230–
YMLGW230–

LED module, green, 110-230V AC, EM10
Article #: UR6L1052–
UR6L1052–

Level monitoring relay, input 230V-AC/5A, 2 CO
Article #: ZRAR0011–
ZRAR0011–

Timer singlefunctionOFF-delay AMPARO,24VAC/DC, 230VAC,1CO,5A
Article #: RT424615–
RT424615–

PCB Relay 2 C/O 115VAC 8A pinning 5.0
Article #: MT28800—
MT28800—

Article #: YRS16016–
YRS16016–

Retaining clip, S-Relay series 4
Article #: LSTD0500–
LSTD0500–

Thermal Overload Relay 3,5-5,00 A size 00
Article #: MT321012–
MT321012–

Plug-in Relay 11 pin 3 C/O 12VDC 10A, series MT
Article #: LSTD1200–
LSTD1200–

Thermal Overload Relay 9,00 – 12,00 A size 00
Article #: LA300111K3
LA300111K3

Motor prot. relay 8-11A U12/16E…K3 Manual-Reset
Article #: RM732024-C
RM732024-C

Power Relay 3 C/O 24VDC 16A, plain cover, AMP Faston 187
Article #: LSTD0320–
LSTD0320–

Thermal Overload Relay 2,2-3,2A size 00
Article #: YPT16016–
YPT16016–

Retaining clip
Article #: PT570506–
PT570506–

Plug-in Relay 14 pin 4 C/O 6VAC 6A, series PT
Article #: LST23200–
LST23200–

Thermal Overload Relay 22-32A size 2
Article #: RT114012–
RT114012–

PCB Relay 1 C/O 12VDC 12A pinning 3.5
Article #: PT17021—
PT17021—

Retaining clip for PT socket PT7874P
Article #: RP421024-B
RP421024-B

PCB Relay 1 C/O 24VDC 8A pinning 5.0
Article #: MT326115–
MT326115–

Plug-in Relay 11 pin 3 C/O 115VAC 10A, series MT
Article #: RM838024–
RM838024–

Power Relay 2 C/O 24VDC 25A, horizontal, AMP Faston 250
Article #: PT17024—
PT17024—

Retaining clip for PT socket PT78xx
Article #: XT374LC4–
XT374LC4–

Plug-in Relay 8 pin 1 C/O 24VDC 16A, with LED and PD
Article #: LSTD0160–
LSTD0160–

Thermal Overload Relay 1,1-1,6A size 00
Article #: URL91010–
URL91010–

Level monitoring immersion probe
Article #: MT328024–
MT328024–

Plug-in Relay 11 pin 3 C/O 24VAC 10A with LED, series MT
Article #: MTMF0W00–
MTMF0W00–

Multifunction module for socket MT78740
Article #: RM732730–
RM732730–

Power Relay 3 C/O 230VAC 16A, plain cover, Faston 187
Article #: RT314005–
RT314005–

PCB Relay 1 C/O 5VDC 16A pinning 5.0
Article #: LST02000–
LST02000–

Thermal Overload Relay 14-20A size 0
Article #: LA300112K3
LA300112K3

Motor prot. relay 10-14A U12/16E…K3 Manual-Reset
Article #: PT570R24–
PT570R24–

Plug-in Relay 14 pin 4 C/O 24VAC 6A with LED, series PT
Article #: RM7357305E
RM7357305E

Power Relay 3 C/O 230VAC 16A, mounting bracket

Article #: EA274115–
EA274115–

EASY719ACRC-240VAC,control relay,12IN-dig, 6OUT-relays,clock
Article #: PT570060–
PT570060–

Plug-in Relay 14 pin 4 C/O 60VDC 6A, series PT
Article #: LQ610230–
LQ610230–

Modular Impulse Relay, 4 NO, 230VAC
Article #: LQ663230–
LQ663230–

Central Controlled Impulse Relay, 3 NO, 230VAC
Article #: YRT78624–
YRT78624–

Screw Type terminal socket I/O with pinning 3.5
Article #: LSTD0063–
LSTD0063–

Thermal Overload Relay 0,45-0,63A size 00
Article #: LSTD0100–
LSTD0100–

Thermal Overload Relay 0,70-1,00A size 00
Article #: RT114524–
RT114524–

PCB Relay 1 C/O 24VAC 12A pinning 3.5
Article #: RP420024-B
RP420024-B

PCB Relay 1 C/O 24VDC 8A pinning 5.0
Article #: RT425730–
RT425730–

PCB-Relay 2C/O, 230V-AC, 8A, 5mm-Pinning, gold plated
Article #: EA274104–
EA274104–

EASY512ACRC-240VAC,control relay, 8IN-dig, 4OUT-relays,clock
Article #: ZR5B0025–
ZR5B0025–

Two-time multifunction 12-240V AC/DC, 2CO, 8A/250V
Article #: RTE24024–
RTE24024–

PCB Relay 2 C/O 24VDC 8A pinning 5.0, wash tight
Article #: MT323060–
MT323060–

Plug-in Relay 11 pin 3 C/O 60VDC 10A with LED, series MT
Article #: PT580L24–
PT580L24–

Plug-in Relay 14 pin 4 C/O 24VDC 6A, gold plated and LED
Article #: MT321110–
MT321110–

Plug-in Relay 11 pin 3 C/O 110VDC 10A, series MT
Article #: LA300113K3
LA300113K3

Motor prot. relay 13-18A U12/16E…K3 Manual-Reset
Article #: PT270524–
PT270524–

Plug-in Relay 8 pin 2 C/O 24VAC 12A, series PT
Article #: PT570006–
PT570006–

Plug-in Relay 14 pin 4 C/O 6VDC 6A, series PT
Article #: ST3P2LC4–
ST3P2LC4–

SNR-Package 24VDC SK Relay with gold plated contacts
Article #: LQ617048–
LQ617048–

Modular Impulse Relay, 1 CO, 48VAC/24VDC
Article #: EA212314–
EA212314–

EASY618ACRE-240VAC,control relay expand,12IN-dig,6OUT-relay
Article #: SNR03012–
SNR03012–

Slim PCB Relay 1 C/O 12VDC 6A
Article #: RP611024-E
RP611024-E

PCB Relay 1 C/O 24VDC 5A pinning 2.5
Article #: LST02500–
LST02500–

Thermal Overload Relay 20-25A size 0
Article #: EA274109–
EA274109–

EASY512DCRC-24VDC, control relay, 8IN-dig, 4OUT-relay, clock
Article #: EA274103–
EA274103–

EASY512ACR-240VAC,control relay, 8IN-digital, 4OUT-relays
Article #: MT331024–
MT331024–

Plug-in Relay 11 pin 3 C/O 24VDC 10A, gold plated, series MT
Article #: RT31L024–
RT31L024–

PCB Inrush-relay 1 C/O 24VDC 16A pinning 5.0
Article #: LQ617230–
LQ617230–

Remote switch, 1 C/O, 230VAC
Article #: ST3FLC4—
ST3FLC4—

SNR screw type socket
Article #: PT570548–
PT570548–

Plug-in Relay 14 pin 4C/O 48VAC 6A, series PT
Article #: LST24000–
LST24000–

Thermal Overload Relay 28-40A size 2
Article #: ESR018923-
ESR018923-

PROTECTOR K switching relay, 24VDC/10A, 230VAC/5A, white
Article #: LST01000–
LST01000–

Thermal Overload Relay 7,00 -10,00A size 0
Article #: LST01250–
LST01250–

Thermal Overload Relay 9-12,5A size 0
Article #: BC990015–
BC990015–

RCCB-Relay for Frequenzconverter f. CT 0,1/0,3A, type A, S
Article #: MT226024–
MT226024–

Plug-in Relay 8 pin 2 C/O 24VAC 10A, series MT
Article #: EA256267–
EA256267–

EASY819ACRC-240VAC,Control relay, 12IN-dig, 6OUT-relay,clock
Article #: MT336230–
MT336230–

Plug-in Relay 11 pin 3 C/O 230VAC 10A, gold plated
Article #: LST37500–
LST37500–

Thermal Overload Relay 57-75A size 3
Article #: LSZ3TE01–
LSZ3TE01–

Article #: LST00400–
LST00400–

Thermal Overload Relay 2,8-4,0A size 0
Article #: PT28800—
PT28800—

Retaining clip metal
Article #: LA300104K3
LA300104K3

Motor prot. relay 0,6-0,9A U12/16E…K3 Manual-Reset
Article #: RT424006–
RT424006–

PCB Relay 2 C/O 6VDC 8A pinning 5.0
Article #: PE014024–
PE014024–

PCB-relay 1C/O, 24V-DC, 5A, 2.5mm-pinning
Article #: LST02200–
LST02200–

Thermal Overload Relay 17-22A size 0
Article #: LST00630–
LST00630–

Thermal Overload Relay 4,5-6,3A size 0
Article #: LST00800–
LST00800–

Thermal Overload Relay 5,5-8,00 A size 0
Article #: LA300114K3
LA300114K3

Motor prot. relay 17-23A U12/16E…K3 Manual-Reset
Article #: LQ203024–

Từ khóa gợi ý: Rơ Le Schrack Rơ Le Bảo Vệ Rơ Le Bảo Vệ Bảo Vệ Rơ Le - Rơ Le Bảo Vệ Rơ Le Bảo Vệ Điện Áp Rơ Le Bảo Vệ Dòng Điện Rơ-Le Bảo Vệ Điện Áp Rơ Le Bảo Vệ Pmr Rơ Le Bảo Vệ Dòng Rơ Le Bảo Vệ Pha Rơ Le Bảo Vệ Selec Rơ Le Bảo Vệ Rm22Tr33 Rơ Le Bảo Vệ D Rơ Le Bảo Vệ Selco Rơ Le Bảo Vệ Nhiệt Rơ Le Bảo Vệ K8Ak Rơ Le Bảo Vệ Euvr Rơ Le Bảo Vệ Eovr Rơ-Le Bảo Vệ Dòng

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Mr Phụng

CÔNG TY TNHH TỰ ĐỘNG HÓA HOÀNG PHÚC

HẾT HẠN

Mã số :	15639135
Địa điểm :	Toàn quốc
Hình thức :	Cần bán
Tình trạng :	Hàng mới
Hết hạn :	24/06/2019
Loại tin :	Thường