凸面: convex surface; crown板式: plate-type; type of metre fo ...平: flat; level; even; smooth焊: weld; solder钢: sharpen; strop; whet制管: tubulation法兰: flange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凸面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with raised face for pn 0mpa凹凸面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with male and female 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平面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with flat face for pn 0mpa突面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with flate face or raised face凹凸面对焊钢制管法兰: steel pipe welding neck flanges with male and female face for pn 0mpa; steel pipe welding neck flanges with male and female face for pn 5mpa; steel pipe welding neck flanges with male and female face for pn mpa凸面对焊钢制管法兰: steel pipe welding neck flanges with raised face for pn 0mpa; steel pipe welding neck flanges with raised face for pn 25mpa; steel pipe welding neck flanges with raised face for pn 5mpa; steel pipe welding neck flanges with raised face for pn 6mpa (bar)gb/t 8-pn 0mpa(bar)环连接面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with ring-joint face for pn 0mpa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凹凸面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with male and female face凸面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with raised face for pn 0mpa凸面钢制管法兰盖: steel pipe blank flanges with raised face for pn 0mpa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