We use advanced technology to cut out a seal groove in the middle of ball middle of ball milled founder iron piston ring. After all kinds of rub-resistant alloy materials being inlayed in the seal groove of piston ring*the rub-resistant alloy seamlessly integrates with the piston ring as a whole. As a result of the qualities of high rub resistance and good oil stockpile, the coefficient of friction has been greatly reduced. Simultaneously, the lubrication and steeling functions both are improved
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