GB/T 39493-2020燃气燃烧器和燃烧器具用安全和控制装置特殊要求压力调节装置标准
英文:Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Pressure regulators GB/...
英文:Safety and control devices for gas burners and gas-burning appliances—Particular requirements—Pressure regulators GB/...