| 单词 | dead sheave |
| 释义 | > as lemmasdead sheave dead sheave n. ‘a scored aperture in the heel of a top-mast, through which a second top-tackle pendant can be rove’ (Smyth, Sailor's Word-bk.). ΚΠ 1857 J. G. Wilkinson Egyptians 112 A single square sail..raised or lowered by lifts running in dead-sheeve holes at the top of the mast. < as lemmas |
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