Home / Standards / GB/T 7962.7-1987 GB/T 7962.7-1987 Abolished Colourless optical glass test methods--Examination method for extent of stria 无色光学玻璃测试方法 条纹度检测方法 Standard Type GBT ICS 81.040 CCS N05 Status 废止 Issue Date 1987-06-20 Implementation 1987-12-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A