All valves to be suitable for double block and bleed service.

所有阀门需有双堵塞和双排放功能。

youdao

These valves are for pressure or vacuum service.

此类阀门适用于压力、真空装置。

youdao

Many NIBCO ball valves are available for oxygen service.

许多美国尼伯科球阀都可用于氧气应用。

youdao

Many NIBCO ball valves are available for oxygen service.

许多美国尼伯科球阀都可用于氧气应用。

youdao