| 单词 | sister block |
| 释义 | > as lemmassister block sister block n. Nautical a tackle block having two sheaves (sheave n.1 2a), usually one above the other. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > equipment of vessel > tackle or purchase > [noun] > system of) pulley(s) > for raising or lowering sails ram-head1514 ram's head1627 jewel block1769 sister block1794 sister1834 1794 D. Steel Elements & Pract. Rigging & Seamanship I. 156 Sister-blocks are made of ash, similar to two single blocks, and are turned out of a solid piece,..one above the other. c1860 H. Stuart Novices or Young Seaman's Catech. (rev. ed.) 23 Take it..through the upper sheave of the sister block. 2014 L. Gordon et al. in K. J. Crisman Coffins of Brave iv. 101 Sister blocks seized between the legs of the topmast shrouds are shown in the reconstruction. < as lemmas |
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