Home / Standards / GB/T 22149-2008 GB/T 22149-2008 Active Overhead projectors - Methods for measuring performance characteristics 透射式投影器 性能特性测定方法 Standard Type GBT ICS 37.040.10 CCS N45 Status 现行 Issue Date 2008-07-02 Implementation 2009-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A