master regulating control valve是什么意思

用法例句

This paper presents the manufacturing method for inner chamber of HP main steam control valve for 600MW turbine under current conditions.

就在现有条件下解决 6 0 0MW汽轮机高压主汽调节阀的内腔加工难关 ,实现该部件的内部生产制造方案进行介绍。