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| 单词 | spider-sheave |
| 释义 | > as lemmasspider-sheave spider-sheave n. a form of sheave or pulley-block somewhat resembling a spider in construction. ΘΚΠ society > occupation and work > equipment > lifting or hoisting equipment > [noun] > tackle > pulley(s) mounted in case > types of snatch-blocka1625 runnera1738 jack block1794 mufflea1830 snatch1850 fiddle-block1858 truss-block1883 spider-sheave1903 power block1928 1903 Sci. Amer. 31 Jan. 80/1 A couple of spider-sheaves were sent ashore. < as lemmas |
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