The part of a bar or lever to either side of a pivot, joint, or fulcrum; either of the (perpendicular) distances between the fulcrum of a lever…
| 单词 | θ214323 | 
| 释义 | society > occupation and work > equipment > machine > parts of machines > lever > 			[noun]		 > parts of (2)		 arm1588 The part of a bar or lever to either side of a pivot, joint, or fulcrum; either of the (perpendicular) distances between the fulcrum of a lever… gab1792 In a steam engine or other mechanism: a notch or groove at one end of a lever, designed to fit a spindle or shaft to which the lever communicates…  | 
	
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