| 单词 | reversible-pitch | 
| 释义 | > as lemmasreversible-pitch   reversible-pitch adj. designating a reversible propeller in which the pitch of the blades can be reversed while the direction of rotation remains unchanged. ΘΚΠ society > travel > air or space travel > a means of conveyance through the air > aeroplane > parts of aircraft > means of propulsion > 			[adjective]		 > types of propeller feathering1909 reversible-pitch1919 adjustable pitch1934 coaxial1934 1919    Bull. Airplane Engin. Dept. U.S.A. 2 124/1  				The design..of a reversible pitch propeller hub is proceeding rapidly. 1951    P. Du Cane High-speed Small Craft xi. 131  				Variable (controllable) reversible-pitch propellers have so far been fitted in relatively few experimental craft built in Great Britain. 2000    Virginian-Pilot 		(Norfolk, Va.)	 		(Nexis)	 13 Sept.  a1  				The ship's controllable reversible pitch propellers and twin rudders were damaged. < as lemmas  | 
	
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