| 单词 | halfturning bolt | 
| 释义 | > as lemmashalf-turning bolt Π 1868    Technologisches Wörterbuch III. 445/1  				Pêne à demi-tour, der halbtourige Riegel. Half-turning-bolt. 1874    E. H. Knight Amer. Mech. Dict. I. 322/1  				A half-turning bolt is one having a half-screw thread on one side and engaging in a similarly threaded socket. half-turning bolt   half-turning bolt  n. (see quot. a1877). ΚΠ a1877    E. H. Knight Pract. Dict. Mech. II. 1050  				Half-turning bolt, one with a thread occupying one half of its cylindrical surface. < as lemmas  | 
	
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