Home / Standards / GB/T 16523-1996 GB/T 16523-1996 Active Specification for round quartz photomask substrates 圆形石英玻璃光掩模基板规范 Standard Type GBT ICS 31.200 CCS L90 Status 现行 Issue Date 1996-09-09 Implementation 1997-05-01 Responsible Dept 国家标准委 Drafting Unit N/A