male screw 中文意思是什麼
male screw
解釋
陽螺旋,柱螺紋。-
Low pressure bronze male screw - thread check valve for marine use
船用低壓外螺紋青銅止回閥 -
Low bressure bronze male screw - thread check valve for marine use
船用低壓外螺紋青銅止回閥
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