• A oil-impregnated vanes pump with high efficacy and well-worn performance acts as vacuum source,two-stage vacuum systems,and double vacuum meter equipped for supervising the vacuum level of two-stage vacuum systems.
• Safety device can prevent positive pressure from producing and entering working system,The air filter can reduce contamination to the environment.
• The unit case made of engineering plastics,external appearance novel,structure reasonable.Operating tray can be placed on top of the unit case that provides facility.
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