leak-proof motor pump 防漏式电动泵
Pump installed in the blast area should be based on an explosion regional levels, using explosion-proof motor.
安装在爆炸区域的泵，应根据爆炸区域等级，采用防爆电动机。
The flame-proof oil and gas recovery vacuum pump has the advantages of small volume, 40%smaller than an oil and gas recovery vacuum pump of the same flow which is provided with a motor.
本实用新型的优点是体积小，它的体积比同流量自带电机 油气回收真空泵小百分之四十；
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