non-rising-stem valve

阀门英语大全 ... non-return foot valve 止回底阀 non-rising-stem valve 不升杆式阀 normal valve 定位阀 ...

英语语言词典 #... ... rising stem gate valve 明杆式闸阀 non-rising-stem valve 暗杆阀门 non-rising stem valve 不升杆式阀 ...