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GB/T 7604-1987 Determination of the aromatic hydrocarbon content in mineral insulating oils - 英文版 |
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GB/T 6730.51-1986 Methods for chemical analysis of iron ores--The caustic asbestos absorption gravimetric method for the determination of carbon content in carbonate - 英文版 |
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GB/T 6730.50-1986 Methods for chemical analysisof iron ores--The gas volumetric method for the determination of total carbon content - 英文版 |
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GB/T 3654.4-1983 Methods for chemical analysis of ferroniobium--The combustion gravimetric method for the determination of carbon content - 英文版 |
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GB/T 3653.2-1983 Methods for chemical analysis of ferroboron--The gasometric method for the determination of carbon content - 英文版 |
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GB/T 3489-1983 Hardmetals--Metallographic determination of porosity and uncombined carbon - 英文版 |
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GB/T 3144-1982 Toluene--Determination of hydrocarbon impurities--Gas chromatographic method - 英文版 |
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