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 - 英文版 |
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GB/T 35842-2018 Technical requirements for pre-insulated directly buried valve of urban heating - 英文版 |
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GB 25131-2010 Safety requirements for water chillers (heat pump) using the vapor compression cycle - 英文版 |
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GB/T 21094-2007 Pre-heat requirements for starterless tubular fluorescent lamps - 英文版 |
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