凸面: convex surface; crown平: flat; level; even; smooth焊: weld; solder环: ring; hoop松: pine板式: plate-type; type of metre fo ...钢: sharpen; strop; whet制管: tubulation法兰: flange凸面对焊环松套板式钢制管法兰: loose plate steel pipe flanges with welding neck collar with raised face for pn 0mpa凹凸面平焊环板式松套钢制管法兰: loose plate steel pipe flanges with weld-on collar with male and female face突面平焊环板式松套钢制管法兰: loose plate steel pipe flanges with weld-on collar with raised face榫槽面平焊环板式松套钢制管法兰: loose plate steel pipe flanges with weld-on collar with tongue and groove face铜合金平焊环松套板式钢法兰: loose plate steel flanges with copper alloy plate collar for brazing or welding凹凸面对焊环板式松套钢制管法兰: loose plate steel pipe flanges with welding neck collar with male and female face凸面板式平焊钢制管法兰: slip-on welding plate steel pipe flanges with raised face for pn 6mpa铜合金对焊环松套板式钢法兰: loose plate steel flanges with copper alloy welding neck collar突面对焊环板式松套钢制管法兰: loose plate steel pipe flanges with welding neck collar with raised face榫槽面对焊环板式松套钢制管法兰: loose plate steel pipe flanges with welding neck collar with tongue and groove face凸面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with raised face for pn 0mpa板式翻边松套钢制管法兰: loose plate steel pipe flanges with lapped pipe end for pn 0mpa平面板式平焊钢制管法兰: slip-on welding plate steel pipe flanges with flat face for pn 6mpa突面板式平焊钢制管法兰: slip-on-welding plate steel pipe flanges with flate face or raised face环连接面对焊环带颈松套钢制管法兰: loose hubbed steel pipe flanges with welding neck collar with ring-joint face突面对焊环带颈松套钢制管法兰: loose hubbed steel pipe flanges with welding neck collar with raised face