| 单词 | level luffing crane | 
| 释义 | > as lemmaslevel luffing crane   level luffing  n. luffing in which the load is maintained at constant height; frequently attributive, as  level luffing crane. ΘΚΠ society > occupation and work > industry > working with tools or equipment > 			[noun]		 > lifting or hoisting equipment windingc1440 slinging1685 windlassing1834 braking1857 level luffing1922 1922    H. H. Broughton Electr. Handling of Materials III. 33  				Few level-luffing arrangements have been devised by crane makers on the Continent. 1963    R. Hammond Mobile & Movable Cranes iv. 110  				Level luffing is achieved by the Babcock ‘swan neck’ supported by a fixed guy rope. 1971    Engineering Apr. 65 		(advt.)	  				Level luffing cranes. < as lemmas  | 
	
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