短語詞組短語water -tightness 阻水性;不透水性Water Valve Tightness Test 水中閥體密封性試驗Water -tightness test under dynamic pressure 動態(tài)壓力下不透水性試驗water r tightness 水密性air -tightness or water-tightness 氣密或水密封的field water tightness test 現(xiàn)場水緊張測試;水密性試驗;現(xiàn)場水密性試驗 返回 water tightness