Home / Standards / GB/T 23231-2009 GB/T 23231-2009 Active Checking regulation in project for conversion of cropland to forest 退耕还林工程检查验收规则 Standard Type GBT ICS 65.020.40 CCS B64 Status 现行 Issue Date 2009-02-23 Implementation 2009-08-01 Responsible Dept 国家林草局 Drafting Unit 国家林草局