榫槽: tongue-and-groove; mortise面: face法兰: flange槽面法兰: groove flange榫槽面: tongued and grooved surface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榫槽面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with tongue and groove 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榫槽面型钢制管法兰用石棉橡胶垫片: asbestos rubber gaskets for steel pipe flanges with tongue and groove face凹面法兰: concave flange; female flange; lower flange凹凸面法兰: male and female flange单面法兰绒: jersey flannel宽面法兰: full face flange平面法兰: face-flange; flat-face flange; plain-straight-face flange; plane normal双面法兰绒: shaker fla el; shaker flannel凸面法兰: convex flange; male flange; raised face flange; raised-face flange突面法兰: raised face flange窄面法兰: narrow face flange整面法兰: full faced宽敞面法兰垫: full-face gasket槽面: gf grooe face; groove face; slotted surface; trough face; trough surface