有提高的抗擦伤性、抗裂性和抗疲劳性的活塞环，和它的生产方法，以及活塞环和气缸体的组合。
Piston ring excellent in resistance to scuffing, cracking and fatigue and method for producing same, and combination of piston ring and cylinder block.
有提高的抗擦伤性、抗裂性和抗疲劳性的活塞环，和它的生产方法，以及活塞环和气缸体的组合。
Piston ring excellent in resistance to scuffing, cracking and fatigue and method for producing same, and combination of piston ring and cylinder block.
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