... : 2 Thick cardboard: Rotary Vane Vacuum Pump is suitable for refrigeration, electronic light bulb industry, printing, pharmacy, foodpackaging, ... the container, get the air out make it for vacuum, inparticular for refrigeration repair(refrigerant such as R12/R22/R134a ... whenstop pumping.2. Environmental DesignThe oil tank is for interlayer processing, and add the oil and gas separating device ...