| 单词 | vent-piece | 
| 释义 | > as lemmasvent-piece   vent-piece  n. ΘΚΠ society > armed hostility > military equipment > weapon > device for discharging missiles > firearm > parts and fittings of firearms > 			[noun]		 > breech > vent > parts connected with vent-astragal1769 vent-field1769 vent-piece1859 1859    F. A. Griffiths Artillerist's Man. 		(1862)	 205  				Vent Piece, a plug of steel or wrought iron, containing the vent. 1868    Rep. Munitions War 146  				A 7-inch breech-loading polygrooved rifled gun on the Armstrong ventpiece system. 1875    E. H. Knight Pract. Dict. Mech.  				Vent-piece,..the block which closes the rear of the bore in a breech-loader. < as lemmas  | 
	
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