Home / Standards / GB/T 39521-2020 GB/T 39521-2020 Active Tractors and machinery for agriculture—Auto-guidance systems for operator-controlled tractors and self-propelled machines—Safety requirements 农业拖拉机和机械 拖拉机和自走式机械的自动导航系统 安全要求 Standard Type GBT ICS 65.060.01 CCS B90 Status 现行 Issue Date 2020-11-19 Implementation 2021-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A