罗茨式真空泵,罗茨螺杆机组,罗茨旋片机组,罗茨水环机组,罗茨滑阀机组,移动式真空机组等。
Roots Vacuum Pumps, Roots and Vane Systems, Roots and Water-ring Systems, Roots and Piston Systems, Moves Freely Vacuum Systems and so on.
罗茨式真空泵,罗茨螺杆机组,罗茨旋片机组,罗茨水环机组,罗茨滑阀机组,移动式真空机组等。
Roots Vacuum Pumps, Roots and Vane Systems, Roots and Water-ring Systems, Roots and Piston Systems, Moves Freely Vacuum Systems and so on.
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