Home / Standards / GB/T 1149.10-2013 GB/T 1149.10-2013 Active Internal combustion engines-Piston rings―Part 10: Keystone rings made of steel 内燃机 活塞环 第10部分：梯形钢环 Standard Type GBT ICS 27.020 CCS J92 Status 现行 Issue Date 2013-12-31 Implementation 2014-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A