榫槽: tongue-and-groove; mortise面: face平: flat; level; even; smooth焊: weld; solder环: ring; hoop板式: plate-type; type of metre fo ...松: pine钢: sharpen; strop; whet制管: tubulation法兰: flange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翻边环板式松套钢制管法兰: loose plate steel pipe flanges with lapped end凸面平焊环松套板式钢制管法兰: loose plate steel pipe flanges with weld-on-collar with raised face for pn 6mpa板式翻边松套钢制管法兰: loose plate steel pipe flanges with lapped pipe end for pn 0mpa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榫槽面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with tongue and groove face for pn 0mpa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榫槽面对焊钢制管法兰: steel pipe welding neck flanges with tongue and groove face for pn 0mpa; steel pipe welding neck flanges with tongue and groove face for pn 5mpa; steel pipe welding neck flanges with tongue and groove face for pn 6mpa榫槽面钢制管法兰盖: steel pipe blank flanges with tongue and groove face for pn 0mpa榫槽面整体钢制管法兰: integral steel pipe flanges with tongue and groove face for pn 0mpa; integral steel pipe flanges with tongue and groove face for pn mpa; integral steel pipe flanges with tongue and groove face for pn0mpa; integral steel pipe flanges with tongue and groove face for pn6mpa