The safety switch controlling the ignition circuit in gas engine and flameout magnetic valve in diesel engine is used in air brake system to realize the automatic protect.
为保证车辆的安全运行，在气压制动系统中施加安全保护开关，控制发动机的点火电路(汽油机)或熄火电磁阀电路(柴油机)，可实现低气压时的自动保护。
The utility model discloses an automatic controlling protective valve of a Roots vacuum pump used in the industries, such as paper making, chemical industry, ceramic, cigarette, etc.
本实用新型公开一种对造纸、化工、陶瓷、卷烟等行业所用的罗茨真空泵。
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