| 单词 | topmast |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔fid〕Nautical A square bar used as a support for a topmast.【航海】 桅栓：方木条，用来支撑中桅美国传统〔futtock plate〕An iron plate attached horizontally to the top of the lower mast to secure the topmast rigging and the upper ends of the futtock shrouds.内龙骨翼板：一种用于保护中桅索具和桅楼侧支索的最上端部分而水平地安装在低桅顶端的铁板美国传统〔futtock shroud〕One of the iron rods extending from a band on the lower mast to the futtock plate, used to brace the base of the topmast.桅楼侧支索：一种用来固定中桅底座而从低桅的一个箍圈延伸到内龙骨翼板的铁杆美国传统〔main topgallantmast〕The section of the mainmast next above the main topmast on a square-rigged sailing vessel.主上桅：横帆式帆船上主顶桅之上紧挨着主桅的部分美国传统〔reef〕To shorten (a topmast or bowsprit) by taking part of it in.缩桅：通过收回一部分的方法来缩短（中桅或船首斜桁）美国传统〔topgallant〕Nautical Of, relating to, or being the mast above the topmast, its sails, or its rigging.【航海】 上桅的：高过中桅的桅杆的，上桅帆的，上桅索具的；与上桅及其帆或索具有关的美国传统〔top〕Nautical A platform enclosing the head of each mast of a sailing ship, to which the topmast rigging is attached.【航海】 桅楼，桅盘：帆船上包围着所有帆头的平台，顶桅索具就加结于其上美国传统 |
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