Home / Standards / GB/T 23821-2009 GB/T 23821-2009 Abolished Safety of machinery - Safety distances to prevent hazard zones being reached by upper and lower limbs 机械安全 防止上下肢触及危险区的安全距离 Standard Type GBT ICS N/A CCS J09 Status Abolished Issue Date 2009-05-13 Implementation 2009-12-01 Centralized Committee 国家标准委 Issuing Authority 国家标准委