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UZ hom profile kub dov steel ntawv pawg
Cov nplooj ntawv steel yog ib hom hlau nrog lub xauv, thiab nws cov ntu ntu yog ncaj, zawj thiab Z-puab, thiab muaj ntau qhov ntau thiab tsawg.
thiab cov ntaub ntawv sib cuam tshuam.Feem ntau yog Larson, Lackawanna thiab lwm yam.
Nws qhov zoo yog: lub zog siab, yooj yim rau kev tsav tsheb mus rau hauv cov av tawv txheej;tuaj yeem tsim hauv dej tob, yog tias tsim nyog, ntxiv inclined kev txhawb nqa los ua ib lub tawb.Kev ua tau zoo dej tsis zoo;tuaj yeem tsim cofferdams ntawm ntau yam duab raws li qhov xav tau, thiab tuaj yeem rov qab siv tau ntau zaus, yog li nws tau siv dav.