China Pre-heat requirement GB Standards Search Result |
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GB/T 39194-2020 Technical requirement of heat treatment for vacuum low pressure carburizing high pressure gas quenching 真空低压渗碳高压气淬热处理技术要求 - 中英文版 |
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GB/T 35842-2018 Technical requirements for pre-insulated directly buried valve of urban heating 城镇供热预制直埋保温阀门技术要求 - 中英文版 |
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GB 25131-2010 Safety requirements for water chillers (heat pump) using the vapor compression cycle 蒸气压缩循环冷水（热泵）机组 安全要求 - 中英文版 |
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GB/T 21094-2007 Pre-heat requirements for starterless tubular fluorescent lamps 无启动器管形荧光灯预热要求 - 中英文版 |
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