The causes of hydrogen penetration through metal seal diaphragm of pressure difference transmitter are described.
简述了氢气对差压变送器隔离膜片的渗透原因,介绍了采用在膜片表面镀金或陶瓷/金双涂层,以防止氢气渗透的方法。
Objective To observe the prevention effects of hollowed palpebral and bulbar conjunctiva isolate to the atretoblepharia.
目的 观察自行改制的中空隔离眼片对眼外伤后睑球粘连的预防作用。
Separating efficiency of separator panels rigged in beam trawls for fishes;
分隔网片对桁拖网鱼类渔获的分隔效率