8 Kev Paub Txog Cov Qauv Hlau

Nyob rau hauv xyoo tas los no, cov txheej txheem hauv nroog tau nrawm dua thiab nrawm dua, thiab prefabricated steel qauv tsev kev lag luam tau ua tiav txoj kev loj hlob tsis tau muaj dua. Cov neeg muaj kev xav tau siab dua thiab siab dua rau kev ua tau zoo thiab kev nyab xeeb ntawm cov tsev. Nyob rau hauv niaj hnub kev tsim kho engineering, steel qauv tsim muaj qee qhov zoo, thiab nws daim ntawv thov hauv kev tsim kho tau dhau los ua ntau thiab ntau dua. Ua ke nrog ntau xyoo ntawm kev ua haujlwm, K-home summed li 8 kev paub yooj yim txog steel qauv, cov ntsiab lus yog ntev, thov nyeem nws ua siab ntev:

1.Cov yam ntxwv ntawm cov qauv hlau:

1. Cov qauv steel muaj lub teeb yuag
2. Kev ntseeg siab ntawm steel qauv ua haujlwm
3. Cov hlau muaj kev vibration zoo (poob siab) thiab cuam tshuam tsis kam
4. Cov qauv hlau tuaj yeem sib dhos kom raug thiab nrawm
5. Nws yog ib qho yooj yim los ua cov qauv kaw
6. Steel qauv yog yooj yim rau corrode
7. Tsis zoo hluav taws tsis kam ntawm steel qauv

2. Qib Thiab Cov Khoom Ntawm Cov Khoom Siv Khoom Siv Hlau

1. Carbon steel qauv: Q195, Q215, Q235, Q255, Q275, thiab lwm yam.
2. Tsawg alloy siab zog structural steel
3. High-quality carbon structural steel thiab alloy structural steel
4. Lub hom phiaj tshwj xeeb steel

3. Cov ntsiab lus ntawm kev xaiv cov khoom siv rau cov qauv hlau

Lub hauv paus ntsiab lus xaiv cov khoom ntawm steel qauv yog los xyuas kom meej lub peev xwm ntawm lub load-bearing qauv thiab tiv thaiv brittle tsis ua hauj lwm nyob rau hauv tej yam kev mob. Nws raug xam tias yog raws li qhov tseem ceeb ntawm cov qauv, cov yam ntxwv ntawm kev thauj khoom, cov qauv tsim, lub xeev kev ntxhov siab, txoj kev sib txuas, thickness ntawm cov hlau thiab qhov chaw ua haujlwm. ntawm.

Plaub hom hlau tau hais hauv "Code for Design of Steel Structures" GB50017-2003 yog hom "tsim" thiab yog thawj qhov kev xaiv thaum muaj xwm txheej tso cai. Kev siv lwm hom tsis txwv, tsuav yog cov hlau siv tau raws li qhov yuav tsum tau ua ntawm cov lus qhia tshwj xeeb.

Plaub, cov ntsiab lus tseem ceeb ntawm steel qauv:

(a) High-rise steel qauv technology. Raws li lub tsev qhov siab thiab tsim cov kev cai, lub thav duab, thav duab txhawb nqa, lub tog raj kheej thiab loj thav duab qauv yog feem ntau siv, thiab cov khoom siv tuaj yeem yog steel, tawv reinforced pob zeb lossis steel tube pob zeb. Cov tswv cuab steel yog lub teeb thiab ductile, thiab tuaj yeem welded lossis dov, uas yog tsim rau cov tsev siab siab; Cov tswvcuab ntawm cov pob zeb ua kom muaj zog muaj zog thiab muaj kev tiv thaiv hluav taws zoo, thiab tsim nyog rau cov tsev nruab nrab thiab siab siab lossis cov qauv hauv qab; steel yeeb nkab qhob yog ib qho yooj yim los tsim, Rau kem qauv nkaus xwb.

(b) Qhov chaw steel qauv tshuab. Qhov chaw steel qauv muaj qhov zoo ntawm kev sib sib zog nqus, siab rigidity, zoo nkauj tsos thiab kev tsim kho ceev ceev. Lub pob sib koom ua ke tiaj tus kab sib chaws, ntau txheej sib txawv-seem daim phiaj thiab reticulated plhaub nrog cov yeeb nkab steel raws li tus pas nrig yog cov qauv tsim nrog qhov loj tshaj plaws ntawm qhov chaw steel qauv hauv kuv lub teb chaws. Nws muaj qhov zoo ntawm qhov chaw loj rigidity thiab qis steel noj thiab tuaj yeem ua tiav CAD hauv cov txheej txheem tsim, tsim thiab tshuaj xyuas. Ntxiv nrog rau cov qauv kab sib chaws, kuj tseem muaj cov kab hluav taws xob loj loj thiab cov kab hluav taws xob-membrane hauv cov qauv hauv qhov chaw.

(c) Lub teeb steel qauv siv tshuab. Ib daim ntawv tshiab uas muaj cov phab ntsa thiab lub ru tsev lub hnab ntawv yog tsim los ntawm lub teeb xim hlau phaj. Lub teeb steel qauv system tsim los ntawm qhov loj-section nyias-walled H-zoo li tus steel phab ntsa kab teeb thiab lub ru tsev purlins welded los yog dov los ntawm steel daim hlau saum toj no 5 hli, round steel ua los ntawm saj zawg zog kev pab txhawb nqa systems thiab high-strength bolt sib txuas. 30m lossis ntau dua, qhov siab tuaj yeem ncav cuag ntau tshaj kaum metres, thiab lub teeb cranes tuaj yeem teeb tsa. Cov hlau siv yog 20-30kg / m2. Tam sim no muaj cov txheej txheem tsim qauv thiab cov chaw tsim khoom tshwj xeeb, nrog cov khoom lag luam zoo, kev teeb tsa ceev ceev, lub teeb yuag, kev nqis peev tsawg, thiab kev tsim kho tsis txwv raws caij nyoog, haum rau txhua yam ntawm lub teeb muaj cov nroj tsuag.

(d) Steel-concrete composite qauv tshuab. Cov kab teeb thiab kem load-bearing qauv tsim los ntawm seem steel lossis steel tswj thiab cov khoom ua vaj tse yog cov hlau-pob zeb sib xyaw, thiab nws daim ntawv thov ntau yam tau nthuav dav hauv xyoo tas los no. Cov qauv sib xyaw muaj qhov zoo ntawm cov hlau thiab pob zeb, nrog rau tag nrho lub zog, zoo rigidity, thiab zoo seismic kev ua tau zoo. Thaum siv cov txheej txheem sab nrauv, nws muaj kev tiv thaiv hluav taws zoo dua thiab tiv thaiv corrosion. Cov tswv cuab sib xyaw ua ke feem ntau tuaj yeem txo cov hlau los ntawm 15 mus rau 20%. Cov hauv pem teb sib xyaw thiab cov pob zeb uas muaj cov hlau tubular tseem muaj qhov zoo ntawm qhov tsawg lossis tsis muaj formwork, yooj yim thiab ceev kev tsim kho, thiab muaj peev xwm nce qib. Nws yog tsim rau thav duab kab, kab thiab pem teb ntawm ntau zaj dab neeg lossis cov tsev siab siab nrog cov khoom loj, muaj tsev kab thiab pem teb, thiab lwm yam.

(e) Lub zog muaj zog bolt txuas thiab vuam tshuab. High-strength bolts kis kev nyuaj siab los ntawm kev sib txhuam thiab muaj peb yam: bolts, ceev thiab washers. Lub zog muaj zog bolt txuas muaj qhov zoo ntawm kev tsim kho yooj yim, hloov tau yooj yim dismantling, siab bearing muaj peev xwm, zoo qaug zog tsis kam thiab nws tus kheej-locking, thiab kev nyab xeeb siab. Nws tau hloov riveting thiab ib nrab vuam hauv qhov project thiab tau dhau los ua txoj kev sib txuas tseem ceeb hauv kev tsim khoom thiab kev teeb tsa ntawm cov qauv hlau. Rau cov khoom siv hlau thiab cov phaj tuab ua nyob rau hauv lub rhiav, tsis siv neeg ntau cov hlau arc submerged vuam yuav tsum tau siv, thiab lub thawv-kem clapboard yuav tsum siv melting nozzle electro slag vuam thiab lwm yam thev naus laus zis. Hauv kev teeb tsa thiab kev tsim kho, semi-automatic vuam tshuab, roj-shielded flux-cored vuam hlau thiab tus kheej-shielded flux-cored vuam hlau technology yuav tsum tau siv.

(f) Steel qauv tiv thaiv technology. Kev tiv thaiv ntawm cov qauv hlau muaj xws li kev tiv thaiv hluav taws, tiv thaiv corrosion thiab tiv thaiv xeb. Feem ntau, nws tsis yog yuav tsum tau ua cov tshuaj tiv thaiv xeb tom qab kev kho hluav taws kub-retardant txheej, tab sis nws tseem yuav tsum tau tiv thaiv corrosion nyob rau hauv cov tsev nrog corrosive gas. Muaj ntau hom hluav taws kub retardant coatings, xws li TN series, MC-10, thiab lwm yam. Ntawm lawv, MC-10 hluav taws kub retardant txheej muaj xws li alkyd enamel xim, chlorinated roj hmab xim, fluororubber xim thiab chlorosulfonated xim. Hauv kev tsim kho, cov txheej txheem tsim nyog thiab txheej txheej yuav tsum raug xaiv raws li cov qauv steel, qib qib hluav taws kub thiab kev xav tau ib puag ncig.

5. Lub Hom Phiaj Thiab Kev Ntsuas Ntawm Cov Qauv Hlau:

Steel qauv engineering koom nrog ntau yam kev nyuaj thiab yuav tsum ua raws li lub teb chaws thiab kev lag luam cov qauv hauv nws cov kev txhawb nqa thiab kev thov. Cov chaw tswj xyuas kev tsim kho hauv cheeb tsam yuav tsum tau ua tib zoo saib xyuas cov txheej txheem tshwj xeeb ntawm steel qauv engineering, npaj cov kev cob qhia ntawm pab pawg soj ntsuam zoo, thiab sau cov ntsiab lus ntawm kev ua haujlwm thiab kev siv thev naus laus zis tshiab raws sijhawm. Cov tsev kawm ntawv qib siab thiab cov tsev kawm qib siab, cov tuam tsev tsim qauv thiab cov tuam txhab tsim kho yuav tsum ua kom muaj kev cob qhia ntawm steel qauv engineering cov kws tshaj lij thiab txhawb cov thev naus laus zis ntawm steel qauv CAD. Pawg kev kawm loj yuav tsum koom tes nrog kev txhim kho cov qauv hlau thev naus laus zis, ua kom muaj kev sib pauv kev kawm thiab kev cob qhia kev ua ub no hauv tsev thiab txawv teb chaws, thiab nquag txhim kho tag nrho cov txheej txheem steel qauv tsim, tsim khoom, kev tsim kho thiab kev teeb tsa thev naus laus zis, thiab tuaj yeem muab khoom plig hauv yav tom ntej nyob ze.

6. Txoj kev sib txuas ntawm cov qauv hlau

Muaj peb hom kev sib txuas rau cov qauv hlau: kev sib txuas vuam, ntsia hlau txuas thiab rivet txuas.

(a), Vuam Seam Connection

Lub vuam seam kev twb kev txuas yog ib nrab yaj cov electrode thiab cov vuam los ntawm lub tshav kub generated los ntawm lub arc, thiab ces condense rau hauv ib tug weld tom qab txias, thiaj li mus txuas lub weldment tag nrho.

Qhov zoo: tsis muaj qhov tsis muaj zog ntawm cov khoom seem, txuag cov hlau, cov qauv yooj yim, kev tsim khoom yooj yim, kev sib txuas siab nruj, kev ua haujlwm zoo sealing, yooj yim siv tsis siv neeg ua haujlwm nyob rau hauv qee yam kev mob, thiab kev ua haujlwm siab.

Qhov tsis zoo: thaj tsam ntawm cov hlau tsis zoo ntawm cov hlau nyob ze ntawm qhov vuam vim qhov kub ntawm qhov vuam tuaj yeem ua rau qee qhov chaw; Thaum lub sij hawm welding txheej txheem, cov hlau yog raug rau unevenly faib siab kub thiab txias, uas ua rau welding residual kev nyuaj siab thiab residual deformation ntawm cov qauv. Cov kabmob muaj peev xwm, nruj thiab kev ua haujlwm muaj qee yam cuam tshuam; vim lub siab tawv ntawm cov qauv welded, cov kab nrib pleb hauv zos yog yooj yim nthuav mus rau tag nrho ib zaug lawv tshwm sim, tshwj xeeb tshaj yog nyob rau hauv qis kub. Cov teeb meem tuaj yeem tshwm sim uas txo qhov qaug zog.

(b), Bolt Kev Txuas

Bolted kev twb kev txuas yog txuas cov connectors rau hauv ib lub cev los ntawm bolts, xws li fasteners. Muaj ob hom kev sib txuas bolted: zoo tib yam bolted kev sib txuas thiab kev sib txuas siab bolted.

Qhov zoo: txheej txheem kev tsim kho yooj yim thiab kev teeb tsa yooj yim, tshwj xeeb tshaj yog tsim rau qhov chaw teeb tsa thiab kev sib txuas, thiab yooj yim rau disassemble, haum rau cov qauv uas yuav tsum tau sib dhos thiab disassembly thiab kev sib txuas ib ntus.

Disadvantages: Nws yog ib qho tsim nyog yuav tsum qhib qhov ntawm lub phaj thiab kho lub qhov thaum sib sau ua ke, uas ua rau kom muaj kev tsim khoom thiab yuav tsum muaj kev tsim khoom siab; lub qhov ntsia liaj qhov rooj kuj tseem ua rau cov ntoo khaub lig ntawm cov khoom tsis muaj zog, thiab cov khoom sib txuas feem ntau yuav tsum sib tshooj los yog ntxiv cov kev sib txuas ntxiv. Phaj (los yog lub kaum sab xis steel), yog li cov qauv yog qhov nyuaj thiab nws raug nqi ntau dua hlau.

(c), Rivet Kev Txuas

Kev sib txuas rivet yog ib lub rivet nrog lub taub hau semi-circular prefabricated ntawm ib kawg, thiab tus ntsia thawv ntsia hlau tau nrawm nrawm rau hauv lub qhov ntsia hlau ntawm qhov txuas tom qab hlawv liab, thiab tom qab ntawd lwm qhov kawg yog riveted rau hauv tus ntsia thawv taub hau nrog rivet. phom los ua kom kev sib txuas nruj. khov kho.

Qhov zoo: riveted quab yuam kis tau tus mob yog txhim khu kev qha, yas thiab toughness yog zoo, zoo yog ib qho yooj yim mus xyuas thiab lav, thiab nws yuav siv tau rau hnyav thiab ncaj qha bearing dynamic load lug.

Qhov tsis zoo: Cov txheej txheem riveting yog qhov nyuaj, tus nqi tsim khoom yog kev ua haujlwm thiab cov khoom siv, thiab kev siv zog ua haujlwm siab, yog li nws tau hloov pauv los ntawm kev sib txuas ntawm vuam thiab lub zog siab.

7. Kev sib txuas ntawm vuam

(A) Vuam txoj kev

Feem ntau siv vuam txoj kev rau steel qauv yog arc vuam, nrog rau phau ntawv arc vuam, tsis siv neeg los yog semi-automatic arc vuam, thiab roj shielded vuam.

Kev tuav arc vuam yog feem ntau siv vuam txoj kev hauv cov qauv hlau, nrog cov cuab yeej yooj yim thiab hloov tau yooj yim thiab ua haujlwm yooj yim. Txawm li cas los xij, kev ua haujlwm tsis zoo, kev tsim khoom tau qis dua qhov tsis siv neeg lossis semi-automatic vuam, thiab qhov sib txawv ntawm vuam zoo yog qhov loj, uas nyob ntawm qee yam ntawm cov txheej txheem ntawm cov welder.

Qhov zoo ntawm cov vuam tsis siv neeg vuam yog ruaj khov, qhov tsis xws luag ntawm cov vuam yog tsawg, cov yas zoo, thiab cov kev cuam tshuam toughness yog zoo, uas yog tsim rau vuam ntev ncaj welds. Semi-automatic welding yog tsim rau vuam nkhaus los yog welds ntawm txhua yam zoo vim kev tuav haujlwm. Tsis siv neeg thiab semi-automatic vuam yuav tsum siv vuam hlau thiab flux haum rau lub ntsiab hlau, vuam hlau yuav tsum tau raws li cov kev cai ntawm lub teb chaws cov qauv, thiab cov flux yuav tsum tau txiav txim raws li cov txheej txheem vuam yuav tsum.

Gas shielded vuam siv cov roj inert (los yog CO2) roj raws li qhov nruab nrab tiv thaiv ntawm lub arc kom cais cov hlau molten los ntawm huab cua kom cov txheej txheem vuam ruaj khov. Lub arc cua sov ntawm cov roj shielded welding yog concentrated, lub vuam ceev yog ceev, thiab qhov nkag mus tob yog loj, yog li lub zog ntawm vuam yog siab dua li ntawm phau ntawv vuam. Thiab zoo plasticity thiab corrosion kuj, haum rau vuam ntawm tuab steel daim hlau.

(b), Daim ntawv ntawm Weld

Daim ntawv vuam seam kev sib txuas tuaj yeem muab faib ua plaub hom: pob tw pob tw, ceg tawv sib koom tes, T-shaped sib koom tes thiab fillet sib koom ua ke raws li kev sib koom ua ke ntawm cov khoom sib txuas. Cov welds siv rau cov kev sib txuas no yog nyob rau hauv ob daim ntawv yooj yim, taub qab welds thiab fillet welds. Nyob rau hauv daim ntawv thov tshwj xeeb, nws yuav tsum raug xaiv raws li lub zog ntawm kev sib txuas, ua ke nrog kev tsim khoom, kev teeb tsa thiab vuam tej yam kev mob.

(C) Weld Structure

1. Buttweld

Butt welds xa cov quab yuam ncaj qha, du, thiab tsis muaj kev ntxhov siab tseem ceeb, yog li lawv muaj kev ua haujlwm zoo thiab tsim nyog rau kev sib txuas ntawm cov khoom uas muaj cov khoom zoo li qub thiab cov dynamic loads. Txawm li cas los xij, vim qhov kev xav tau zoo ntawm lub pob tw welds, qhov sib txawv ntawm qhov vuam vuam yog nruj, thiab nws feem ntau yog siv hauv kev sib txuas ntawm lub Hoobkas.

2. Fillet vuam

Daim ntawv ntawm fillet welds: fillet welds tuaj yeem muab faib ua sab fillet welds thaum uas tig mus rau lub zog ua yeeb yam thiab pem hauv ntej fillet welds perpendicular rau lub zog ua yeeb yam thiab obliquely cuam tshuam lub zog ua yeeb yam raws li lawv qhov ntev thiab cov kev taw qhia ntawm sab nraud quab yuam . slanted fillet welds thiab ncig welds.

Daim ntawv cross-sectional ntawm fillet weld tau muab faib ua hom zoo tib yam, hom kab nqes tiaj thiab hom nkag mus tob. Lub hf nyob rau hauv daim duab yog hu ua qhov loj ntawm fillet weld. Qhov sib piv ntawm sab ceg ntawm seem zoo tib yam yog 1: 1, uas zoo ib yam li daim duab peb sab isosceles txoj cai, thiab cov kab hluav taws xob xa mus yog khoov duav, yog li qhov kev ntxhov siab hnyav heev. Rau cov qauv ncaj qha bearing lub dynamic load, nyob rau hauv thiaj li yuav ua rau kom lub zog kis tau tus mob du, lub pem hauv ntej fillet weld yuav tsum tau txais lub tiaj tus nqes hav hom nrog qhov loj ratio ntawm ob fillet npoo 1: 1.5 (sab ntev yuav tsum tau ua raws li cov kev taw qhia ntawm tus ncej. Internal quab yuam), thiab sab fillet weld yuav tsum tau txais qhov ratio ntawm 1: 1 tob tob.

8. Bolt txuas

(rau). Cov qauv ntawm Ordinary Bolt txuas

Daim ntawv thiab Specification ntawm Ordinary Bolts

Cov qauv siv los ntawm cov qauv steel yog hom loj hexagonal taub hau, thiab nws cov cai yog sawv cev los ntawm tsab ntawv M thiab lub npe thiab txoj kab uas hla (mm). M18, M20, M22, M24 feem ntau siv hauv engineering. Raws li cov qauv thoob ntiaj teb, bolts yog ib txwm sawv cev los ntawm lawv cov qib kev ua tau zoo, xws li "qib 4.6", "qib 8.8" thiab lwm yam. Tus lej ua ntej tus lej lej qhia qhov tsawg kawg nkaus tensile lub zog ntawm cov khoom siv ntsia liaj qhov rooj, xws li "4" rau 400N / mm2 thiab "8" rau 800N / mm2. Cov lej tom qab tus lej lej (0.6, 0.8) qhia qhov sib piv ntawm cov khoom siv ntsia liaj qhov rooj, uas yog, qhov sib piv ntawm qhov taw tes rau qhov tsawg kawg nkaus tensile lub zog.

Raws li qhov tseeb machining ntawm bolts, bolts zoo tib yam muab faib ua peb theem: A, B, thiab C.

A thiab B-qib bolts (refined bolts) yog ua los ntawm 8.8-qib steel, tig los ntawm cov cuab yeej siv tshuab, nrog rau qhov chaw du thiab qhov tseeb, thiab tau nruab nrog chav kawm I qhov (uas yog, lub qhov ntsia hlau yog drilled lossis nthuav dav ntawm cov khoom sib dhos, lub qhov phab ntsa yog du, thiab lub qhov yog qhov tseeb). Vim nws qhov tseeb machining siab, kev sib cuag nrog lub qhov phab ntsa, me me kev sib txuas deformation, thiab kev ua haujlwm zoo, nws tuaj yeem siv rau kev sib txuas nrog cov shear loj thiab tensile rog. Txawm li cas los xij, nws siv zog ntau dua thiab raug nqi los tsim thiab txhim kho, yog li nws tsis tshua siv hauv cov qauv steel.

Qib C bolts (ntsuab bolts) yog ua los ntawm qib 4.6 lossis 4.8 steel, kev ua haujlwm ntxhib, thiab qhov loj me tsis raug txaus. Tsuas yog hom II qhov yuav tsum tau (uas yog, lub qhov ntsia liaj qhov rooj yog xuas nrig ntaus ntawm ib feem ntawm ib lub sij hawm los yog drilled yam tsis muaj ib tug xyaum. Thaum lub zog shear raug xa mus, qhov kev sib txuas deformation yog qhov loj, tab sis qhov kev ua tau zoo ntawm kev xa tawm lub zog tensile tseem zoo, kev ua haujlwm tsis xav tau cov cuab yeej tshwj xeeb, thiab tus nqi qis. Feem ntau siv rau kev sib txuas bolted nyob rau hauv nro thiab theem nrab shear txuas nyob rau hauv cov qauv uas yog statically los yog indirectly dynamically loaded.

Kev npaj ntawm Ordinary Bolted kev sib txuas

Kev npaj ntawm bolts yuav tsum yooj yim, sib xws thiab compact, kom ua tau raws li qhov yuav tsum tau ua, thiab cov qauv yuav tsum tsim nyog thiab yooj yim rau nruab. Muaj ob hom kev npaj: sab-los-sab thiab staggered (raws li qhia hauv daim duab). Lub parallel yog yooj yim dua, thiab staggered yog ntau compact.

(B). Cov yam ntxwv kev nyuaj siab ntawm Ordinary Bolted Connections

• Shear bolt kev twb kev txuas
• Tension bolt kev twb kev txuas
• Pull-shear bolt txuas

(C). Cov yam ntxwv kev ntxhov siab ntawm High-Strength Bolts

High-strength bolted kev sib txuas tuaj yeem muab faib ua hom kev sib txhuam thiab hom siab raws li kev tsim thiab kev quab yuam. Thaum cov kev sib txhuam kev sib txhuam yog raug rau shearing, qhov siab tshaj plaws kev sib txhuam kuj yuav tshwm sim ntawm daim hlau thaum lub sab nraud shear quab yuam mus txog lub xeev txwv; thaum tus txheeb ze plam tshwm sim ntawm daim hlau, nws tau txiav txim siab tias qhov kev sib txuas tau ua tsis tiav thiab puas lawm. Thaum lub siab-kev sib txuas yog sheared, kev sib txhuam quab yuam raug tso cai kom kov yeej thiab cov txheeb ze ntawm cov phaj tshwm sim, thiab tom qab ntawd lub zog sab nraud tuaj yeem nce ntxiv, thiab qhov kawg tsis ua hauj lwm ntawm cov ntsia hlau shearing los yog lub qhov phab ntsa bearing siab. yog lub xeev txwv.

Henan Steel Structure Engineering Technology Co., Ltd. tshwj xeeb hauv kev tsim steel qauv rhiav, warehouses, rhiav thiab lwm yam dej num, thiab muaj peev xwm muab quotations, renderings, installation drawings thiab lwm yam kev pab cuam raws li cov peev nyiaj. Yog xav paub ntxiv, thov sab laj nrog peb pab neeg tshaj lij.

Pom zoo nyeem ntawv