短語(yǔ)詞組短語(yǔ)bailer crown -block 撈砂天車(chē)sliding crown -block 可平移的天車(chē)crown n block 天車(chē)g crown -block 可平移的天車(chē)straight rotary crown -block 單層天車(chē)run into crown -block 碰天車(chē)bailer r crown -block 撈砂天車(chē)valve -against-overwinding crown-block protector 天車(chē)卷牐防碰安裝arch crown block 拱頂石 返回 crown block