Home / Standards / GB/T 15871-1995 GB/T 15871-1995 Active Hard surface photomask substrates 硬面光掩模基板 Standard Type GBT ICS 31.030 CCS L97 Status 现行 Issue Date 1995-12-22 Implementation 1996-08-01 Responsible Dept 国家标准委 Drafting Unit N/A