ISO9001&CE,ISO14001 Alarm system Oil-water sepreater Negative pressure High oil out-put yield SecurityThis is a special ... ), technology is very important, we had been doing oil refining for ten years, actually, have been experienced ... by-product, if it is made by plastic oil refining, it can be made of coal and brick ... . If it is made by tires oil refining, it is called carbon black, it is ...