平面: plane; two dimensions; flat ...带: belt; girdle; ribbon; band; ...颈: neck平: flat; level; even; smooth焊: weld; solder钢: sharpen; strop; whet制管: tubulation法兰: flange凸面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with raised 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凹凸面带颈平焊钢制管法兰: hubbed slip-on-welding steel pipe flanges with male and female face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平面带颈承插焊钢制管法兰: hubbed socked welding steel pipe flanges with flat face 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凹凸面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with male and female face环连接面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with ring-joint 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突面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with raised face榫槽面带颈承插焊钢制管法兰: hubbed socket welding steel pipe flanges with tongue and groove face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突面带颈螺纹钢制管法兰: hubbed screwed steel pipe flanges with raised 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突面板式平焊钢制管法兰: slip-on-welding plate steel pipe flanges with flate face or raised face平面、突面对焊钢制管法兰: steel pipe welding neck flanges with flat face or raised face