Home / Standards / GB/T 17929-2007 GB/T 17929-2007 Active Quartz clocks vehicles 汽车用石英钟 Standard Type GBT ICS 39.040.20 CCS Y11 Status 现行 Issue Date 2007-12-05 Implementation 2008-09-01 Responsible Dept 中国轻工业联合会 Drafting Unit 中国轻工业联合会