| 单词 | bullock block |
| 释义 | bullock block (extremely rare) n WORD FAMILY bullock block n a pulley-block at the head of a topmast Syn|Hyper bollock block, pulley, pulley block, pulley-block a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope |
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