2021GB/T 9237-2017 Refrigeration system and heat pump safety and environmental requirements
2001GB 9237-2001 Mechanical refrigerating systems used for cooling and heating-Safety requirements
0000 GB/T 9237-1988
GB/T 9237-2017 Refrigeration system and heat pump safety and environmental requirements has been changed from GB 9237-2001 Mechanical refrigerating systems used for cooling and heating-Safety requirements.