hect steel s275J {1}} qauv hlau
S275J {{{{1} h-screed steel yog ib qho khoom siv thiab muaj zog ntawm cov khoom siv dag zog, ruaj khov thiab nqi-ua hauj lwm zoo. S275J 0 hect steel nqaj yog dav siv hauv ntau cov kev tsim kho, suav nrog kev tsim cov qauv thiab lwm yam txuas ntxiv. Txhua cov ntsiab hauv cov tshuaj lom neeg hauv S275J {8}} yog nyob rau hauv cov kev ua tau zoo los xyuas cov ntaub ntawv, thiab cov pa roj carbon mon}}. 19%.