... 钢制管法兰类型 types for steel pipe flanges gb/t 1-pn6mpa(16bar) 榫槽面法兰 tongue and groove flange 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 ...
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tongue and groove face flange 榫槽面法兰 ; 槽榫面法兰
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