Home / Standards / GB/T 17865-1999 GB/T 17865-1999 Active Specification for measuring depth of focus and best focus 焦深与最佳聚焦的测量规范 Standard Type GBT ICS 31.200 CCS L56 Status 现行 Issue Date 1999-09-13 Implementation 2000-06-01 Responsible Dept 国家标准委 Drafting Unit N/A