单词：rope block
rope block的用法和样例：
例句
- The lifting device is a system of rope and pulley.这种起重装置是由缆索和滑轮组成的。
- A hitch in the middle of rope that has two eyes into which tackle can be hooked.绳中间的栓含有两个眼状物通过它能钩住滑轮。
- The travelling block is one of the most useful rig parts.游动滑车是最有用的钻机部件之一。
- Seize together,as of parallel ropes of a tackle in order to prevent running through the block.把滑车的平行绳子牢牢抓住，以免滑车通过滑轮转动。
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