短語詞組短語single sheave metal block 單輪金屬滑車multiple sheave pulley block 多坑轆轤double sheave steel block 雙輪鋼滑車steel sheave pulley block 鋼輪滑車single sheave pulley block 單輪滑車double -sheave wooden block 雙輪木滑車wooden sheave block [建]木輪滑車sheave block component 滑車組部件sheave block bearing 滑車組軸承 返回 sheave block