薄膜密封 meaning in English

diaphragm seal

Bubble wrap encapsulated - air plastic sheeting ( bubble wrap ) is packing material made of air bubbles that are encased between two poly sheets as they are sealed together
压缩空气塑料薄膜（泡沫包装）是一种包装材料，它由两块聚酯薄膜密封在一起而在它们之间装入的气泡制成。
But such research is very limited and has not been investigated in domestic at the present time . the purpose of this project is to satisfy this requirement and establish the base for farther research
目前国内关于液相端面开螺旋槽的机械密封研究工作非常有限，本课题论文目的就是通过探讨端面间薄膜密封的机理和密封性能，从而为进一步的研究奠定基础。