This satisfies the requirement of protecting seal spring and also never puts damage to valve on steam turbine.

这样即满足了保护密封圈的要求又不对汽轮机阀体有伤害。

youdao

This satisfies the requirement of protecting seal spring and also never puts damage to valve on steam turbine.

这样即满足了保护密封圈的要求又不对汽轮机阀体有伤害。

youdao