... quality black used used car/motor/bus/ship/machine oil recycling machine is particularly suitable to recycling used internal-combustion ... full-enclosed, there is no any harmful smell come out form the machine, colloid, oxid, acid, pitch will be converted to ... , circle pump; 4. Cooling system: refrigerating machine, water pump, water tank, cooler I,cooler II, Condenser; 5. Vacuum system: Vacuum water ...