| 单词 | pressure tightness | 
| 释义 | > as lemmaspressure tightness   pressure tightness  n. the condition of being pressure-tight. ΘΚΠ the world > space > relative position > closed or shut condition > 			[noun]		 > water- or air-pressure-tight closure Hermes' seal1605 hermetic seal1663 watertightness1826 pressure tightness1945 1945    Materials & Methods XXII. 1750 		(caption)	  				A bronze flame thrower part which required pressure tightness and chemical resistance on the part of the sealant. 2003    Designfax 		(Nexis)	 1 Nov. 42  				Pressure tightness and metallurgical soundness meet the most stringent specifications. < as lemmas  | 
	
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