Home / Standards / GB/T 28491-2012 GB/T 28491-2012 Active Button general technical requirements and testing methods - Natural shell button 钮扣通用技术要求和检测方法 天然贝壳类 Standard Type GBT ICS 61.040 CCS Y77 Status 现行 Issue Date 2012-06-29 Implementation 2012-11-01 Responsible Dept 中国轻工业联合会 Drafting Unit N/A