| 单词 | midship beam |
| 释义 | > as lemmasmidship beam midship beam n. the longest beam in a timber-built ship, forming part of the midship frame, used as the basis for the dimensions and proportions of the ship's masts and yards. ΚΠ c1620 Treat. Shipbuilding (Admiralty Libr. MS 9) in R. Magowan tr. P. Kirsch Galleon (1990) Pl. 92 Ye Depth of the Hold is Taken from that Middship Beam to ye upper edge of the Keel. 1644 H. Mainwaring Sea-mans Dict. 6 The mayne-Beame..next to the mayne-Mast..we call the mid-ship Beame. 1692 Smith's Sea-mans Gram. (new ed.) ii. xv. 122 The breadth upon the Midship-beam 20 foot. 1850 J. Greenwood Sailor's Sea-bk. 95 The Midship-Beam is the longest beam of the ship, lodged in the mid ship frame, or between the widest frame of timbers. 1874 S. J. P. Thearle Naval Archit. (new ed.) I. 109 Mast and pall bitt beams, and beams under the heel of bowsprit,..must not be less in size than the midship beam. < as lemmas |
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