... Pressure gauge, Thermometer, safety valve, cooling pipes,water seal, oil-water separator) 3 Cooling system(10cooling pipes, cooling tower ... and cooling pool) 4 Oil store system(oil tank) 5 Waste gas recycle system(water seal, ... typeST-4 typeRaw materialRaw oilWaste engine oil Waste plastic oilWaste rubber oil Raw oilWaste engine oil Waste plastic oilWaste rubber oilRaw ...