JZJX type Roots-Vane vacuum system consists of the major pump i.e ZJ type Roots vacumm pump and the backing pump i.e. vane vacuum pump.

• JZJX系列罗茨-旋片机组是由ZJ型罗茨真空泵（主抽泵）和旋片式真空泵（前级泵）组成的。