Zhuji City, Jian-Ling Machinery Factory is a company specialized in production of auto parts such as manual valve, master cylinder, relay valve, clutch booster, air dryer and spring brake chamber.

诸暨市剑灵机械厂是一家专业生产手控阀、刹车总泵、继动阀、离合器助力器、空气干燥器、弹簧制动室等汽车配件的企业。

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The mounted location of high-pressure safty valve and the connecting position of the control air pipe of air pressure relay of JZ-7 brake system are analysed.

对重联机车中JZ 7型制动机系统的高压安全阀的安装位置及打风压力继电器（调压器）控制风管的连接位置进行了分析、讨论，指出了现有机车中设计、制造上存在的缺陷，并在实际运用中进行了改造。

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Finally take the relay valve for example, time lag characteristic of air brake actuating system is discussed and the spectrum analysis is introduced in…

以继动阀为例，探讨了气制动传动系统滞后反应时间特性，并将频谱分析引入到对气制动传动系统动态特性的分析与评价中。

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