1)main control valve,主控制阀2)active controlled valve,主动控制阀3)main control spool,主控制滑阀4)main control valve,主配压阀，主控制阀5)main inlet control valve,主调节阀，主进汽控制阀6)main inlet control valve,主调节阀;主进汽控制阀
英汉例句
Reason analysis and countermeazures of troubles for GK_(1C) locomotive main control valve;
