Home / Standards / GB/T 19658 GB/T 19658 Active Method of measurement of center beam intensity and beam angle(s)of reflector lamps 反射灯中心光强和光束角的测量方法 Standard Type GBT ICS 29.140.20 CCS K70 Status 现行 Issue Date 2013-12-31 Implementation 2014-12-01 Responsible Dept 中国轻工业联合会 Drafting Unit 中国轻工业联合会