ASTM A234 tus qauv steel yeeb nkab fittings tau siv dav hauv cov kav dej, nws suav nrog cov khoom siv carbon steel thiab hlau alloy. Dab tsi yog steel yeeb nkab fittings? Steel yeeb nkab haum yog ua los ntawm cov hlau los yog hlau alloy steel yeeb nkab, daim hlau, profiles, mus rau ib tug tej yam uas yuav ua tau ib tug muaj nuj nqi (Ch...
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