weld collar 中文意思是什麼
weld collar
解釋
加強焊縫焊瘤-
Loose plate steel pipe flanges with weld - on collar with tongue and groove face
榫槽面平焊環板式松套鋼制管法蘭 -
Loose plate steel pipe flanges with weld - on collar with raised face
突面平焊環板式松套鋼制管法蘭 -
Loose plate steel pipe flanges with weld - on collar with male and female face
凹凸面平焊環板式松套鋼制管法蘭
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