GB/T 37992-2019燃气燃烧器和燃烧器具用安全和控制装置特殊要求自动截止阀的阀门检验系统国家标准
英文:Safety and control devices for gas burners and gas-burning-appliances—Particular requirements—Vavle-proving systems f...
英文:Safety and control devices for gas burners and gas-burning-appliances—Particular requirements—Vavle-proving systems f...