Covcev squarecov khoom siv feem ntau yog carbon steel square yeeb nkab thiab qis alloy square yeeb nkab khoom. Feem ntau cov kav dej square yog tsim los ntawm cov kav hlau, uas tsim cov kav dej puag ncig los ntawm kev ntim khoom, flattening, crimping thiab vuam txheej txheem, cov kav dej puag ncig yog dov rau hauv cov kav dej square, thiab tom qab ntawd txiav mus rau qhov ntev ntev, cov kav dej square tau muab faib ua cov kav dej zoo nkauj square, txhua yam square. cov kav dej thiab vaj tse square kav, square kav yog siv rau hauv kev tsim kho, machinery manufacturing, steel qauv thiab lwm yam engineering siv, kev ua tau zoo ntawm ib puag ncig siv cov kav dej square yuav txawv, Them rau kev sib txawv thaum yuav.