| 单词 | controllable-pitch | 
| 释义 | Definition of controllable-pitch in English:controllable-pitchadjective Nautical Aeronautics 
 Origin1920s; earliest use found in Science. Definition of controllable-pitch in US English:controllable-pitchadjective Nautical Aeronautics 
 Origin1920s; earliest use found in Science.  | 
	
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