strap butt 中文意思是什麼
strap butt
解釋
搭板對接-
Pit railways ; rails s 30, butt strap fl 30
礦山鐵路. s30鋼軌. fi30對接搭板 -
Steel filter pipes for drilled wells with slot perforation and fisching butt strap joint
帶開槽搭接孔和魚尾板連接的鉆井用鋼制濾管
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