square steel Welded Tube manufacturers

Lus piav qhia luv luv:

1. 100% tom qab-muag zoo thiab kom muaj nuj nqis.
2. Tus kws tshaj lij kev muag khoom teb sai sai hauv 24 teev.
3. Cov Tshuag loj rau qhov ntau thiab tsawg.
4. Cov qauv dawb 20cm siab zoo.
5. Muaj zog tsim muaj peev xwm thiabxa ceev ceev.

Thickness:0.5-60 hli

OD (sab nraud txoj kab uas hla):10 * 10-1000 * 1000 hli square: 10 * 15 800 * 1100mm

Ntawv pov thawj:CE, LEED, BV, PHD & EPD, BC1, EN 10210, EN10219, ISO9000, ASTM A500, ASTM A501, AS1163, JIS G3466

Ntev:3-12M raws li cov neeg siv khoom xav tau

Qauv:ASTM A500 / A501, EN10219 / 10210, JIS G3466, GB / T6728 / 3094 AS1163, CSA G40.20 / G40.21

Khoom siv:Gr.A/B/C, S235/275/355/420/460, A36, SS400, Q195/235/355, STKR400/490,300W/350W

MOQ:2-5 Tons

Lub sij hawm xa tuaj:7-30 Hnub

Txoj kev them nyiaj:TT / LC

Kev kam rau siab:± 5% lossis raws li xav tau

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Khoom cim npe

Tianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd.
Nrog rau kev tsim tawm txhua xyoo ntawm 10 lab tons, Yuantai Derun yog cov chaw tsim khoom loj tshaj plaws ntawm ERW square kav, cov kav dej plaub, cov kav dej hollow, cov kav dej galvanized, ncaj submerged arc welded steel kav thiab kauv welded kav hauv Suav teb. Kev muag khoom txhua xyoo mus txog 15 billion US dollars. Yuantai Derun muaj 59 xim dubERW cevcov kab ntau lawm, 10galvanized yeeb nkabcov kab ntau lawm thiab 3 kauv welded yeeb nkab ntau lawm kab. Square yeeb nkab 10 * 10 * 0.5mm rau 1000 * 1000 * 60MM,rectangular steel yeeb nkab10 * 15 * 0.5mm to 800 * 1100 * 60MM, straight seam welded steel pipe φ 355.6-2000mm, spiral pipe Φ 219-2032mm, seamless pipe φ 21.3-820mm。 Yuantai Derun can produce square rectangular pipes conforming to ASTM A500/ASTM A501, JIS g3466, en10219, EN10210,din2240 and as1163. Yuantai Derun has the largest square tube inventory in China, which can meet the direct purchase needs of customers. Welcome to contact Yuantai Derun, e-mail: sales@ytdrgg.com , real-time connection factory inspection or factory visit!

Square raj yog dov los ntawm sawb hlau, yog li nws yooj yim heev rau kev tsim khoom. Ntxiv mus, cov duab ntawm lub raj square yog square lossis duab plaub, uas yog qhov zoo heev rau kev txhawb nqa ntawm cov khoom thiab kev tsim kho ntawm lwm yam khoom. Square tube muaj lub neej ntev thiab kev ua haujlwm ruaj khov rau kev lag luam, yog li nws yog qhov kev xaiv zoo rau kev lag luam dav dav.

Covsquare thiab rectangular rajyog qhov yooj yim hauv kev tsim cov txheej txheem, kuj tsis tshua muaj kev xav tau, thiab tsim nyog rau kev tsim khoom loj thiab kev yuav khoom. Lawv kuj muaj qhov zoo ntawm tus nqi thiab lwm yam. Lawv tuaj yeem txhawb nqa cov khoom zoo thiab ua tiav cov txiaj ntsig zoo thaum siv. Lawv yog cov khoom siv tsev yooj yim tsawg rau cov lag luam.

Specification ntawmSQUARE STEEL WELDED TUBE

OD (MM)	Thickness (MM)	OD (MM)	Thickness (MM)	OD (MM)	Thickness (MM)	OD (MM)	Thickness (MM)
20 * 20	1.3	60 * 120 80 * 100 90 * 90	1.50 Nws	180 * 180 hli	3	300 * 800 400 * 700 550 * 550 500 * 600
	1.4		1.70 ib		3.5-3.75 Nws		9.5-9.75 Nws
	1.5		1.80 ib		4.5-4.75 Nws		11.5-11.75 dr hab
	1.7		2.00 Nws		5.5-7.75 Nws		12-13.75 Nws
	1.8		2.20		9.5-9.75 Nws		15-50
	2.0		2.5-4.0 Nws		11.5-11.75 dr hab
20 * 30 25 * 25	1.3		4.25-4.75 Nws		12.0-25.0 Nws
	1.4		5.0-6.3	100 * 300 150 * 250 200 * 200	2.75 ib	300 * 900 400 * 800 600 * 600 500 * 700
	1.5		7.5-8		3.0-4.0 Nws		9.5-9.75 Nws
	1.7	50 * 150 60 * 140 80 * 120 100 * 100	1.50 Nws		4.5-9.75 Nws		11.5-11.75 dr hab
	1.8		1.70 ib		11.5-11.75 dr hab		12-13.75 Nws
	2.0		2.00 Nws		12.5-12.75 dr hab		15-50
	2.2		2.20		13.5-13.75 dr hab
	2.5-3.0 Nws		2.5-2.75 Nws		15.5-30 Nws
20 * 40 25 * 40 30 * 30 30 * 40	1.3		3.0-4.75 Nws	150 * 300 200 * 250	3.75 ib	300 * 1000 400 * 900 500 * 800 600 * 700 650 * 650
	1.4		5.5-6.3		4.5-4.75 Nws
	1.5		7.5-7.75 Nws		5.5-6.3		9.5-9.75 Nws
	1.7		9.5-9.75 Nws		7.5-7.75 Nws		11.5-11.75 dr hab
	1.8		11.5-16.5 Nws		9.5-9.75 Nws		12-13.75 Nws
	2.0	60 * 160 80 * 140 100 * 120	2.50 Nws		11.5-11.75 dr hab		15-50
	2.2		2.75 ib		13.5-30 Nws
	2.5-3.0 Nws		3.0-4.75 Nws	200 * 300 250 * 250	3.75 ib	400 * 1000 500 * 900 600 * 800 700 * 700
	3.25-4.0 Nws		5.5-6.3		4.5-4.75 Nws
25 * 50 30 * 50 30 * 60 40 * 40 40 * 50 40 * 60 50 * 50	1.3		7.5-7.75 Nws		5.5-6.3		9.5-9.75 Nws
	1.4		9.5-16		7.5-7.75 Nws		11.5-11.75 dr hab
	1.5	75 * 150 hli	2.50 Nws		9.5-9.75 Nws		12-13.75 Nws
	1.7		2.75 ib		11.5-11.75 dr hab		15-50
	1.8		3.0-3.75 Nws		12-13.75 Nws
	2.0		4.5-4.75 Nws		15.5-30 Nws
	2.2		5.5-6.3	200 * 400 250 * 350 300 * 300	4.5-6.3	500 * 1000 600 * 900 700 * 800 750 * 750
	2.5-3.0 Nws		7.5-7.75 Nws		7.5-7.75 Nws		9.5-9.75 Nws
	3.25-4.0 Nws		9.5-16		9.5-9.75 Nws		11.5-11.75 dr hab
	4.25-4.75 Nws	80 * 160 120 * 120	2.50 Nws		11.5-11.75 dr hab		12-13.75 Nws
	5.0-5.75 Nws		2.75 ib		12-13.75 Nws		15-50
	5.75-6.3		3.0-4.75 Nws		15.5-30 Nws
40 * 80 50 * 70 50 * 80 60 * 60	1.3		5.5-6.3	200 * 500 250 * 450 300 * 400 350 * 350	5.5-6.3	500 * 1100 600 * 900 700 * 800 750 * 750
	1.5		7.5-7.75 Nws		7.5-7.75 Nws		9.5-9.75 Nws
	1.7		9.5-9.75 Nws		9.5-9.75 Nws		11.5-11.75 dr hab
	1.8		11.5-20 Nws		11.5-11.75 dr hab		12-13.75 Nws
	2.0	100 * 150 hli	2.50 Nws		12-13.75 Nws		15-50
	2.2		2.75 ib		15.5-30 Nws
	2.5-3.0 Nws		3.0-4.75 Nws	280 * 280 hli	5.5-6.3	600 * 1100 700 * 1000 800 * 900 850 * 850
	3.25-4.0 Nws		5.5-6.3		7.5-7.75 Nws		9.5-9.75 Nws
	4.25-4.75 Nws		7.5-7.75 Nws		9.5-9.75 Nws		11.5-11.75 dr hab
	5.0-6.0		9.5-9.75 Nws		11.5-11.75 dr hab		12-13.75 Nws
40 * 100 60 * 80 70 * 70	1.3		11.5-20 Nws		12-13.75 Nws		15-50
	1.5	100 * 200 120 * 180 150 * 150	2.50 Nws		15.5-30 Nws
	1.7		2.75 ib	350 * 400 300 * 450	7.5-7.75 Nws	700 * 1100 800 * 1000 900 * 900
	1.8		3.0-7.75 Nws		9.5-9.75 Nws		11.5-11.75 dr hab
	2.0		9.5-9.75 Nws		11.5-11.75 dr hab		12-13.75 Nws
	2.2		11.5-20 Nws		12-13.75 Nws		15-50
	2.5-3.0 Nws	100 * 250 150 * 200	3.00 Nws		15.5-30 Nws
	3.25-4.0 Nws		3.25-3.75 Nws	200 * 600 300 * 500 400 * 400	7.5-7.75 Nws	800 * 1100 900 * 1000 950 * 950
	4.25-4.75 Nws		4.25-4.75 Nws		9.5-9.75 Nws		11.5-11.75 dr hab
	5.0-6.3		9.5-9.75 Nws		11.5-11.75 dr hab		12-13.75 Nws
50 * 100 60 * 90 60 * 100 75 * 75 80 * 80	1.3		11.5-11.75 dr hab		12-13.75 Nws		15-50
	1.5		12.25 Nws		15.5-40 Nws
	1.7	140 * 140 hli	3.0-3.75 Nws	300 * 600 400 * 500 400 * 400	7.5-7.75 Nws	900 * 1100 1000 * 1000 800 * 1200 hli
	1.8		4.5-6.3		9.5-9.75 Nws
	2.0		7.5-7.75 Nws		11.5-11.75 dr hab		20-60
	2.2		9.5-9.75 Nws		12-13.75 Nws
	2.5-3.0 Nws		11.5-25.00 Nws		15.5-40 Nws
	3.25-4.0 Nws	160 * 160 hli	3.00 Nws	400 * 600 500 * 500	9.5-9.75 Nws	1100 * 1000 1100 * 1100
	4.25-4.75 Nws		3.5-3.75 Nws		11.5-11.75 dr hab		20-60
	5.0-5.75 Nws		4.25-7.75 Nws		12-13.75 Nws
	7.5-8		9.5-25.0 Nws		15.5-40 Nws

KHOOM ZOO TSHAJ PLAWS

01 Nws tuaj yeem txhawb nqa khoom zoo thaum siv

Square thiab rectangular raj yog yooj yim nyob rau hauv kev tsim khoom, kuj tsis tshua muaj nyob rau hauv kev xav tau kev pab, thiab yog heev haum rau loj ntau lawm thiab yuav khoom. Lawv kuj muaj qhov zoo ntawm cov nqi. Lawv tuaj yeem txhawb nqa cov khoom zoo thiab ua tiav cov txiaj ntsig zoo thaum siv. Lawv yog cov khoom siv tsev yooj yim tsawg rau cov lag luam

02 Lub neej kev pab cuam kuj tseem ntev

Cov duab ntawm lub raj square yog square lossis rectangular. Cov qauv zoo li no muaj txiaj ntsig zoo rau kev txhawb nqa ntawm cov khoom thiab kev tsim kho ntawm lwm yam khoom. Square raj muaj lub neej ntev thiab kev ua haujlwm ruaj khov rau kev lag luam. Yog li ntawd, nws yog ib qho kev xaiv zoo rau kev lag luam dav dav.

3 CERTIFICATION YOG
Ua kom tiav
tuaj yeem tsim cov yeeb nkab steel khoom ntawm lub ntiaj teb
stardard, xws li European standard, American standard,
Japanese txuj, Astralian standard, natinal standard
thiab lwm yam.

04 Cov khoom lag luam zoo thiab tus nqi qis
Qhov kom zoo dua ntawm cov khoom zoo thiab tus nqi qis yog ib txwm yog ib qho laj thawj tseem ceeb rau kev nyiam ntau tus neeg siv khoom los ntseeg thiab xaiv nws, thiab nws tseem yog tus yuam sij rau nws txoj kev loj hlob dav dav, 200000 tons ntawm cov kav hlau ntawm cov pa loj tuaj yeem ua tau raws li qhov xav tau ceev ntawm cov neeg siv khoom. ..

Cov khoom kub

CERTIFICATE SHOW

Tianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd. muaj ISO9001 ntawv pov thawj, ISO14001 ntawv pov thawj, OHSAS18001 ntawv pov thawj, EU CE10219 system ntawv pov thawj, Fabkis Bureau of Shipping BV ntawv pov thawj, thiab Japanese JIS industrial certification. Thaum ua kom ntseeg tau qhov zoo, peb txuas ntxiv txo cov nqi tswj, txhim kho kev tswj hwm kev ua haujlwm zoo, ua tus thawj coj hauv kev siv lub teb chaws kev sib koom ua ke hais hauv kev lag luam, thiab tib lub sijhawm qhib cov nqi suav cov qauv ntawm kev txiav txim, uas muaj txiaj ntsig zoo rau cov koom tes thiab cov neeg siv khoom. . Yuantai thiab Derun tau cog lus los muab cov neeg siv cov yeeb nkab steel nrog cov khoom lag luam zoo thiab cov kev pabcuam, thiab tau txiav txim siab los ua cov qauv steel kav ntau dua nyob rau hauv Tuam Tshoj txoj kev txhim kho kev lag luam thiab kev tsim kho, kom txhua tus neeg koom tes ua lag luam yooj yim dua. Peb txuas ntxiv mus txuas ntxiv cov saw hlau, nthuav cov pawg lag luam, tsim cov txiaj ntsig zoo, thiab txuas ntxiv txhim kho kev lag luam nce ntxiv. Peb nquag tsim Cubic Rectangular Tube Association thiab muaj kev sib koom ua ke nrog kev tshawb fawb txog kev tshawb fawb thiab cov koom haum pab tswv yim hauv kev lag luam steel, sib sau ua ke kev lag luam kev txawj ntse thiab cov peev txheej, ua kom muaj kev sib raug zoo thiab sib koom tes ntawm kev hloov pauv zoo thiab txhim kho kev lag luam ntawm cov raj raj. , thiab ua kom tsis muaj zog rau lub neej yav tom ntej ntsuab ntawm kev lag luam raj raj. Peb tos ntsoov rau kev koom tes nrog kev sib koom tes, kev sib nrig sib pab thiab yeej-yeej, kev loj hlob zoo, thiab tsim kev ci ntsa iab nrog koj!

EQUIPMENT DISPLAY

Tianjin Yuantai Derun Group thiab domestic hlau thiab hlau kev lag luam sab laj cov tsev kawm ntawv, tsev kawm qib siab thiab tsev kawm ntawv, cov tsev kawm tshawb fawb thiab cov koom haum ua lag luam tau ua tiav kev koom tes ntau hauv kev tsim khoom, kev kawm, kev tshawb fawb thiab kev siv. Cov cuab yeej tsim khoom siab tshaj plaws, kev ua haujlwm zoo tshaj plaws, kev tswj hwm zoo thiab cov txuj ci kev txawj ntse, thiab cov nyiaj txiag muaj zog tau muab kev lees paub zoo rau kev tsim cov khoom siab, zoo thiab cov khoom zoo. Hauv kev lag luam, peb tau ua tus thawj coj hauv kev pib, tsim qauv thiab tsim cov txheej txheem ntawm daim ntawv thov kev taw qhia kev lag luam cov qauv, pawg qauv thiab cov qauv kev lag luam, xws li "cov raj duab plaub rau cov qauv tsim", "cov raj duab plaub rau cov qauv siv tshuab", thiab "kub- dip galvanized rectangular raj rau cov qauv", Cov kab ntau lawm ntawm lub tuam txhab 500 m3 units, 300 m3 units thiab 200 m3 units tau paub txog kev tswj hluav taws xob. automation los ntawm cov qauv hloov mus rau cov khoom tiav. Tam sim no, Pab Pawg muaj 59 cov kab ntau lawm rau cov kav dej dub siab, 10 cov kab kub galvanizing, 3 cov kab ntau lawm rau cov kav welded kav, 1 cov kab ntau lawm rau JCOE1420 ncaj seam steel kav, thiab square steel yeeb nkab khoom siv dav hauv prefabricated steel qauv, iav ntaub thaiv phab ntsa tej yaam num, steel qauv tej yaam num, loj venues, tshav dav hlau tsim, high-ceev, txoj kev, hniav guardrails, ntauwd crane manufacturing, photovoltaic tej yaam num, tsev cog khoom ua liaj ua teb shanty vaj tse, choj tsim, nkoj thiab tsheb manufacturing, Ntau yam teb, xws li machinery manufacturing, tau txais zoo nyob rau hauv loj kev tsim kho tej yaam num.

Cov ntaub ntawv raw ntawm cov chaw tsim khoom loj_01

3 kauv welded steel yeeb nkab ntau lawm kab_03

51 dub high-frequency welded steel yeeb nkab ntau lawm kab_05

10 kub-dip galvanized steel yeeb nkab ntau lawm kab_06

6 cov kab ntau lawm rau pre-galvanized steel kav_07

500 500mm square steel yeeb nkab ntau lawm kab_08

INDEPENDENT LABORATORY

"Yuantai Derun" hom duab plaub lub raj yog tib tus neeg muag khoom ntawm 70000 tuj lub raj raj khoom rau "Siv thiab Txoj Kev" Egyptian kev ua liaj ua teb tsev cog khoom qhov project ntawm Ministry of Agriculture ntawm Tuam Tshoj, tsuas yog tus tswv ntawm 115000 tuj kub-dip galvanized structural tubular pawg. rau kev tsim kho ntawm Qinghai kaum lab kilowatt ultra-high voltage photovoltaic tshiab zog puag, tsuas yog tus neeg muag khoom ntawm Kub-dip galvanized rectangular tube khoom rau Hong Kong Zhuhai Macao Choj Project, National Stadium, National Grand Theatre Beijing Tongzhou Administration Service Center thiab lwm tus neeg muag khoom ntawm cov raj duab plaub rau cov haujlwm tseem ceeb hauv tebchaws yog cov koom tes zoo ntawm cov tuam txhab paub zoo xws li Raws li Tuam Tshoj Minmetals, Shanghai Siv Engineering Group, Tuam Tshoj Railway Siv Tuam Txhab, Tuam Tshoj National Machinery Corporation, Hangxiao Steel Structure, thiab Duowei United Group. Cov khoom muag ntawm Yuantai yog ntau tshaj 200000 tons, thiab cov khoom xa tuaj txhua xyoo yog 20 * 20 * 1.0-1000 * 50mm, 20 * 30 * 1.0-800 * 1200 * 50mm, Φ 219- Φ 1420mm dub, kub-dub square thiab rectangular kav thiab kauv welded cov kav dej ua los ntawm Q195-Q460 muaj peev xwm uas twb muaj ze li ntawm 5 lab tons. Tom qab ua tiav ntawm lub hauv paus tshiab Tangshan, tag nrho lub peev xwm yuav ncav cuag 10 lab tons. Tianjin Yuantai Derun Group yog tus thawj tswj hwm tus thawj tswj hwm ntawm Tuam Tshoj Rectangular Pipe Industry Development and Cooperation Innovation Alliance (lub npe thov los ntawm Tianjin Science thiab Technology Bureau yog "Tianjin Rectangular Pipe Industry Technology Innovation Strategic Alliance"), tshwj xeeb yog caw cov thawj coj ua haujlwm ntawm Tuam Tshoj Steel Structure Association, tus thawj coj thawj coj chav tsev ntawm Tuam Tshoj Steel Structure Association Txias tsim Section ceg, thiab tus lwm thawj chav tsev ntawm Fabricated Building Industry Innovation Alliance.

Peb lub zog

Tianjin Yuantai Derun Group thiab ntau lub tuam txhab kev sab laj, tsev kawm qib siab thiab tsev kawm qib siab, cov tsev kawm tshawb fawb tshawb fawb thiab kev lag luam sib koom ua ke hauv kev lag luam hlau thiab hlau hauv tsev tau ua tiav kev koom tes ntau hauv kev tsim khoom, kev kawm, kev tshawb fawb thiab kev siv. Cov cuab yeej tsim khoom siab tshaj plaws, kev ua haujlwm zoo tshaj plaws, kev tswj hwm zoo thiab cov txuj ci kev txawj ntse, thiab cov nyiaj txiag muaj zog tau muab kev lees paub zoo rau kev tsim cov khoom siab, zoo thiab cov khoom zoo. Hauv kev lag luam, peb tau ua tus thawj coj hauv kev pib, tsim qauv thiab tsim cov txheej txheem ntawm daim ntawv thov kev taw qhia kev lag luam cov qauv, pawg qauv thiab cov qauv kev lag luam, xws li "cov raj duab plaub rau cov qauv tsim", "cov raj duab plaub rau cov qauv siv tshuab", thiab "kub- dip galvanized rectangular raj rau cov qauv "

LUB XWB

cov chaw tsim khoom lag luam duab plaub raug xaiv rau hauv kaum sab saum toj steel raj hom hauv Suav teb

Tus nqi tsim nyog ntawm cov khoom> 100%

Ntim

Tianjin Yuantai Derun Steel Pipe Manufacturing Group muaj nws tus kheej logistics fleet, uas tuaj yeem lav lub hnub xa khoom mus rau qhov siab tshaj plaws, kom cov neeg siv khoom steel tsis muaj kev txhawj xeeb.

FAQ

Q1: Koj puas yog tuam txhab lag luam lossis chaw tsim khoom?

A: Peb yog Hoobkas.

Q2: Koj lub sijhawm xa khoom ntev npaum li cas?

A: Feem ntau nws yog 5-10 hnub yog tias cov khoom muaj nyob hauv Tshuag. los yog nws yog 30 hnub yog tias cov khoom tsis nyob hauv Tshuag, nws yog raws li kom muaj nuj nqis.

Q3: Koj puas muab cov qauv? puas yog dawb los yog ntxiv?

A: Yog lawm, peb tuaj yeem muab cov qauv pub dawb nrog tus nqi thauj khoom los ntawm cov neeg siv khoom.

Q4: Koj cov nqe lus them nqi yog dab tsi?

A: Them <= 1000USD, 100% ua ntej. Kev Them Nyiaj> = 1000USD 30% T / T ua ntej, tshuav nyiaj li cas ua ntej shippment.Yog tias koj muaj lus nug ntxiv, pls xav tiv tauj peb raws li hauv qab no

Yav dhau los: qauv kub-dip galvanized round yeeb nkab

Tom ntej: zoo oval raj steel Oval Exhaust Tubing

Lub tuam txhab muab qhov tseem ceeb rau qhov zoo ntawm cov khoom, nqis peev ntau hauv kev qhia txog cov cuab yeej siv siab heev thiab cov kws tshaj lij, thiab tawm mus ua kom tau raws li qhov xav tau ntawm cov neeg siv khoom hauv tsev thiab txawv teb chaws.
Cov ntsiab lus tuaj yeem faib ua roughly faib rau hauv: tshuaj muaj pes tsawg leeg, yield zog, tensile zog, tej yam khoom, thiab lwm yam
Nyob rau tib lub sijhawm, lub tuam txhab tseem tuaj yeem ua tiav kev tshawb nrhiav qhov tsis zoo hauv online thiab annealing thiab lwm yam kev kho cua sov raws li cov neeg siv khoom xav tau.

https://www.ytdrintl.com/

E-mail:sales@ytdrgg.com

Tianjin YuantaiDerun Steel Tube Manufacturing Group Co., Ltd.yog steel yeeb nkab Hoobkas tau ntawv pov thawj los ntawmEN/ASTM/ JIStshwj xeeb hauv kev tsim thiab xa tawm txhua yam ntawm cov yeeb nkab square, galvanized yeeb nkab, ERW welded yeeb nkab, kauv yeeb nkab, submerged arc welded yeeb nkab, ncaj seam yeeb nkab, seamless yeeb nkab, xim coated steel kauj, galvanized steel kauj thiab lwm yam steel khoom. Kev thauj mus los yooj yim, nws yog 190 mais deb ntawm Beijing Capital International Airport thiab 80 mais deb ntawm Tianjin Xingang.

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