It's suitable to have shell test and seal test for flanged end butterfly valves and wafer type butterfly valves.

适用于法兰连接和对夹式蝶阀的强度和密封性能试验。

youdao

It's suitable to have shell test and seal test for flanged end butterfly valves and wafer type butterfly valves.

适用于法兰连接和对夹式蝶阀的强度和密封性能试验。

youdao