Corten Huab Cua Tiv Thaiv Steel Phaj 1.2Mm 1.5 hli 1.5 hli kev ua siab ntev

Thawj qhov tseeb -} kaum steel patent yog tus tswv los ntawm Asmeskas hlau. Thawj zaug tsim thaum xyoo 1930s los tsim cov wagons kev tsheb ciav hlau, nws yog kev sib xyaw ntawm cov hlau alloys. Thaum cov alloys tau nruab sab nraum zoov, lawv tau ua rau lub patina zoo uas tuav tau zoo, ntsia zoo, thiab yuav tsum tsis muaj kev saib xyuas zoo,