a large block suspended below the cap of the lower mast, used in hoisting or lowering topmasts (see also compounds 3a).
| 单词 | θ206219 |
| 释义 | society > travel > travel by water > vessel, ship, or boat > equipment of vessel > tackle or purchase > [noun] > system of) pulley(s) > for raising or lowering topmast (1) top-block1769 a large block suspended below the cap of the lower mast, used in hoisting or lowering topmasts (see also compounds 3a). |
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