专门做旅游保险的网站百度官方电话
1.阀门部分
2.执行器
行程时间的一般标准
The stroking times are applicable to throttling control valves and should not exceed 2 seconds/inch of valve diameter
3.附件
4.定位器
1.阀门部分
2.执行器
行程时间的一般标准
The stroking times are applicable to throttling control valves and should not exceed 2 seconds/inch of valve diameter
3.附件
4.定位器