同时具有排放和旁通功能，不可作为安全泄压阀使用。

They also are used for relief and by-pass functions; however, they should not be used as safety relief valves.

youdao

同时具有排放和旁通功能，不可作为安全泄压阀使用。

They also are used for relief and by-pass functions; however, they should not be used as safety relief valves.

youdao