W txhais tau tias sau, nrum;C-CARBON STEEL carbon steel, A, b, thiab C qhia lub zog ntawm cov hlau hom los ntawm qis mus rau siab.WCA, WCB, WCC sawv cev rau cov pa roj carbon steel, uas muaj kev vuam zoo thiab kev siv lub zog.ABC sawv cev rau qib zog, feem ntau siv WCB.Cov khoom siv yeeb nkab corr...
Nyeem ntxiv