321 Prefabricated Steel Choj

Lub "321" hom sib sau ua ke steel choj yog tus choj nrawm tsim los ntawm Txoj Kev Loj Npaj thiab Tsim Lub Tsev Haujlwm ntawm Ministry of Communications raws li tus qub British Beret truss choj thiab ua ke nrog peb lub teb chaws thiab kev ua haujlwm. Nws yog tus choj txheem collapsible uas tuaj yeem txhim kho sai. Tag nrho cov choj yog ua los ntawm high-strength steel welded, lub ntsiab nqaj yog lub teeb thav duab uas yuav decomposed, thiab trusses yog kev cob cog rua los ntawm ib tug pins nrog muaj zog interchangeability ntawm Cheebtsam. Nws yog lub teeb hauv qhov hnyav, yooj yim hauv kev thauj mus los thiab disassembly, thiab tuaj yeem sib sau ua ke rau ntau hom prefabricated steel choj raws li qhov kev ncua thiab kev thauj khoom. Nws yog ib qho zoo kawg nkaus composite prefabricated steel choj uas yog dav siv rau kev thauj mus los thaum muaj xwm ceev.