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1. Using high efficiency screw profile
2. Remarkable energy saving with wide inlet pressure of 150-760 torr(=200 - 1013mbar)
3. Applicable to actual vacuum and high efficiency work by Self-adjusting discharge port
4. Hole available to check inside of the pump without disassembly
5. Preventing over-level from using Automatic drain valve
6. Provided separate type of casing with different inlet pressure
7. Applicable to continuous process with low noise
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