| 单词 | pulley check |
| 释义 | > as lemmaspulley check pulley check n. a device or structure which prevents the return of the cord of a pulley through the block. ΚΠ 1875 E. H. Knight Amer. Mech. Dict. III. 1820/1 Pulley-check, an automatic device by which the rope is kept from running back over a pulley. 2000 Daily Record (Glasgow) (Nexis) 15 Apr. 41 Make a small wedge to jam through the pulley wheel, and cut the cord to the required length—measure the pulley check on the side of the sashes to work this out. < as lemmas |
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