短語(yǔ)詞組短語(yǔ)pulley y block 滑輪組electric pulley -block 電動(dòng)葫蘆;電動(dòng)滑車(chē)組pulley -block luffing gear 升降支臂用滑輪組tension pulley block 張緊滑車(chē);張緊滑輪double iron pulley block 雙輪鐵滑車(chē)twin pulley block 雙滑輪組and wormwheel pulley block 蝸桿蝸輪滑車(chē)組Pulley Block Hook 滑輪群拉鉤 返回 pulley block