- a hoisting device in which a rope or chain is passed around a pair of blocks containing one or more pulleys. The upper block is secured overhead and the lower block supports the load, the effort being applied to the free end of the rope or chain
| 单词 | block and tackle |
| 释义 | WordReference Random House Learner's Dictionary of American English © 2024 ˈblock and ˈtack•le, n. [countable] WordReference Random House Unabridged Dictionary of American English © 2024
block′ and tack′le,
Collins Concise English Dictionary © HarperCollins Publishers:: block and tackle n
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