... or net vacuum equipments.2. It has the advantages of small size, light weight, low noise, convenient ... used as first step pump for all kinds of high vacuum pump.2. 2TW series double stage ... oil mist pollution.3. Aluminum alloy motor casingMotor uses aluminum alloy casing, it has a high thermal ... °C) and low voltage(minimum 180V).6. It uses of shockproof rubber feet, it can reducing the vibration noise ...