短語詞組短語jack -up method of shaft alignment 負荷法校中jack engine shaft 轉動軸jack shaft bearing 曲柄軸軸承;曲軸彎曲部分軸軸承;曲柄軸jack shaft pedestal 曲柄軸導框Jack Shaft Speed 傳動軸轉速jack shaft counterweight 曲柄軸平衡塊 返回 jack shaft