| 摘要 |
PROBLEM TO BE SOLVED: To provide a piston ring capable of enhancing the assembly workability at low cost, and reliably reducing gas leak.SOLUTION: The piston ring 2 is arranged on an outer circumference of a piston to suppress distribution of gas between the piston and a cylinder, and integrally comprises a first step-cut part 12 formed on an outer circumferential part, a second step-cut part 13, and an inner ring part 8 formed on an inner circumferential part. |
