凸面: convex surface; crown整体: ensemble; whole; entirety钢: sharpen; strop; whet制管: tubulation法兰: flange凹凸面整体钢制管法兰: integral steel pipe flanges with male and female face for pn 0mpa; integral steel pipe flanges with male and female face for pn 5mpa; integral steel pipe flanges with male and female face for pn 6mpa; integral steel pipe flanges with male and female face for pn mpa环连接面整体钢制管法兰: integral steel pipe flanges with ring-joint face for pn 0mpa平面整体钢制管法兰: integral steel pipe flanges with flat face for pn mpa; integral steel pipe flanges with flat face for pnmpa突面整体钢制管法兰: intergral steel pipe flanges with flat face or raised face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凸面钢制管法兰盖: steel pipe blank flanges with raised face for pn 0mpa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凹凸面钢制管法兰盖: steel pipe blank flanges with male and female face for pn 0mpa凸面板式平焊钢制管法兰: slip-on welding plate steel pipe flanges with raised face for pn 6mpa凸面带颈螺纹钢制管法兰: hubbed screwed steel pipe flanges with raised face for pn 0mpa; hubbed screwed steel pipe flanges with raised face for pn 5m; hubbed screwed steel pipe flanges with raised face for pn 6mpa凸面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with raised face for pn 0mpa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)钢制管法兰: specification for steel pipe flanges; types and parameters for steel pipe flanges凹凸面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with male and female face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凹凸面型钢制管法兰用石棉橡胶垫片: asbestos rubber gaskets for 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