GB/T 39485-2020燃气燃烧器和燃烧器具用安全和控制装置特殊要求手动燃气阀标准
英文:Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Manual gas valves GB/T ...
英文:Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Manual gas valves GB/T ...