The upper master valve is used on a routine basis, with the lower master valve providing backup or contingency function in the event that the normal service valve is leaking and needs replacement.
上部总闸门用于日常运行，而下部总闸门用于在正常使用的闸门发生渗漏并需要更换的情况下提供备用或应急的功能。
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。
The master starting air valve can be operated both manually and electrically.
主启动气门可以手动或电动的方式启动。
The master starting valve, built on the engine, can be operatedboth manually and electrically.
柴油机上的主启动阀可以手动和电控操作。
The master starting valve, built on the engine, can be operatedboth manually and electrically.
柴油机上的主启动阀可以手动和电控操作。
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