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GB/T 41315-2022 Safety shut-off valve for urban gas transmission and distribution system 城镇燃气输配系统用安全切断阀 - 英文版 |
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GB/T 37992-2019 Safety and control devices for gas burners and gas-burning-appliances—Particular requirements—Vavle-proving systems for automatic shut-off valves 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 - 英文版 |
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