2022JB/T 14525-2022 Switch for electric balancing appliances
2004JB/T 6887-2004 Technical condition of cast iron for fans blower and compressors
1993JB/T 6887-1993 Specifications for iron castings for fans
JB/T 14525-2022 Switch for electric balancing appliances has been changed from JB/T 6887-2004 Technical condition of cast iron for fans blower and compressors.