ELBOW LAS BESI SMLS CS SCH40 BENKAN
PIPA BESI / CARBON STEEL SCH40 SEAMLESS
ELBOW SS304 SCH40 WLD
FLANGE SS304 JIS10K NS
SGP 焊接弯头
弯头 A234 WPB SGP 焊接
弯头 A234 WPB SCH40 SMLS
