rope block的用法和樣例：
例句
- The lifting device is a system of rope and pulley.
這種起重裝置是由纜索和滑輪組成的。 - A hitch in the middle of rope that has two eyes into which tackle can be hooked.
繩中間的栓含有兩個眼狀物通過它能鉤住滑輪。 - The travelling block is one of the most useful rig parts.
遊動滑車是最有用的鑽機部件之一。 - Seize together,as of parallel ropes of a tackle in order to prevent running through the block.
把滑車的平行繩子牢牢抓住，以免滑車通過滑輪轉動。
