Home / Standards / GB 11417.1-1989 GB 11417.1-1989 Abolished Hard corneal contact lenses 硬性角膜接触镜 Standard Type GB ICS 81.040.30 CCS Y22 Status 废止 Issue Date 1989-06-08 Implementation 1990-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A