welding neck collar meaning in English

对焊环

Loose plate steel flanges with copper alloy welding neck collar
铜合金对焊环松套板式钢法兰
Loose plate steel pipe flanges with welding neck collar with raised face
突面对焊环板式松套钢制管法兰
Loose hubbed steel pipe flanges with welding neck collar with raised face
突面对焊环带颈松套钢制管法兰
Loose hubbed steel pipe flanges with welding neck collar with ring - joint face
环连接面对焊环带颈松套钢制管法兰
Loose plate steel pipe flanges with welding neck collar with male and female face
凹凸面对焊环板式松套钢制管法兰

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