Combined piston ring is suitable for all types of internal combustion engine and compressor hermetic piston rings, using two radial overlap and pin in place with a combination of loop holes in the wear and tear to other piston ring the same degree, still has a good sealing effect, thus extending the life of the larger solved after causing the engine piston ring wear is not easy to start, fuel, lubricating oil increases, power down, emissions pollution and so on. The combined patented technology compared with the similar rings, use of effective, long life, good processing, production, processing jig radial overlap, forming pin holes one can process more than one hundred rings, greatly reducing the production process of the artificial fees, electricity, mechanical wear and tear charges.
        Combined mechanical wear of piston rings size pieces of many models on the market, China's annual consumption of hundreds of millions of rings, piston ring manufacturers processing almost no modifications can be directly added production and processing equipment, raw materials, like ordinary rings.