GB/T 1149.15-2017内燃机活塞环第15部分:薄型铸铁螺旋撑簧油环国家标准
英文:Internal combustion engines—Piston rings—Part 15: Coil-spring-loaded oil control rings of narrow width made of cast i...
英文:Internal combustion engines—Piston rings—Part 15: Coil-spring-loaded oil control rings of narrow width made of cast i...