gas permeation meaning in English

气体渗透
气体透过

Gas permeation behavior across expanded polytetrafluoroethylene membranes
膨体聚四氟乙烯膜气体透过行为的研究
For the nitrogen - implanted samples , the initiation of crack is greatly delayed , and crack spacing interval is small . the samples prepared by pecvd and piii technologies have been investigated using homemade gas permeation tester . the excellent barrier
而注入件相对沉积件而言,由于没有明显的界面层,而表现为改性层裂纹间距小,但没有完全开裂,具有优良的耐失效性能。