Home / Standards / GB 28231-2011 GB 28231-2011 Active General provisions of safety and health for writing boards 书写板安全卫生要求 Standard Type GB ICS 13.100 CCS C56 Status 现行 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 国家疾控局 Drafting Unit 国家疾控局