Jinzhou Donggong Petrochemical Products Co., Ltd., is located in an important industrial city in the economic circle around Bohai- Jinzhou City, Liaoning Province, is a professional committed to the lubricating oil additives R & D, production and sales, and also provide comprehensive lubrication solutions and technical service enterprises.. After more than ten years of enterprise culture accumulation, the company has more than twenty series of additive package, it contains dozens of varieties, a...