Home / Standards / GB/T 21056-2007 GB/T 21056-2007 Active Specification for adjustable speed drive systems of electricity conservation with VF for fans and pumps 风机、泵类负载变频调速节电传动系统及其应用技术条件 Standard Type GBT ICS 27.010 CCS F01 Status 现行 Issue Date 2007-08-13 Implementation 2008-02-01 Responsible Dept 国家标准委 Drafting Unit N/A