| 单词 | sidebar keel | 
| 释义 | > as lemmassidebar keel   sidebar keel  n. Nautical (now rare) a bar keel composed of a centre plate that passes through the floor of a vessel to which is riveted on each side a sidebar that is wholly below the hull. ΘΚΠ society > travel > travel by water > vessel, ship, or boat > parts of vessels > body of vessel > bottom or part under water > 			[noun]		 > keel and kelson > keel > types of sliding keel1797 centreboard1828 bilge-keel1850 ram1851 rocker1859 sidebar keel1869 bar-keel1874 plate-keel1874 bilge-piece1880 fin1885 bulb-keel1893 fin-keel1893 ballast fin1894 bulb-fin1894 plate1895 drop-keel1896 1869    E. J. Reed Shipbuilding ii. 25  				This is the arrangement known as the ‘side-bar keel’, and a very excellent arrangement it is for external iron keels. 1904    T. Walton Steel Ships 		(ed. 3)	 iv. 45  				The vessel has a side bar keel. 1920    A. F. Johnson Design & Constr. Power Workboats vi. 25/3  				Side bar keels are not extensively employed due chiefly to the difficulty of obtaining good rivet connections. < as lemmas | 
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