参考例句
The lower part of a pulley block.
滑车组较低的一部分
worm and wormwheel pulley block
蜗杆蜗轮滑车组
steel sheave pulley block
钢轮滑车
single sheave iron pulley block
单轮铁滑车
single sheave pulley block
单坑辘轳
means of compensation with pulley block
滑轮组补偿法
single iron pulley block
单轮铁滑车组
multiple sheave pulley block
多坑辘轳
pulley-block luffing gear
(起重机)升降支臂用滑轮组
tension pulley block
张紧滑轮

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