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GB/T 39138.1-2020 Methods for chemical analysis of gold nickel chromium iron silicon boron alloys—Part 1：Determination of gold content—Potentiometric titration using ferrous sulfate - 英文版 |
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GB/T 39138.2-2020 Methods for chemical analysis of gold nickel chromium iron silicon boron alloys—Part 2：Determination of nickel content—Dimethylglyoxime gravimetric method - 英文版 |
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GB/T 39138.3-2020 Methods for chemical analysis of gold nickel chromium iron silicon boron alloys—Part 3：Determination of chromium, iron, silicon and boron contents—Inductively coupled plasma atomic emission spectrometry - 英文版 |
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GB/T 39193-2020 Ambient air—Determination of particulate matter mass concentration—Gravimetric method - 英文版 |
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GB/T 34609.2-2020 Method for chemical analysis of rhodium compounds—Part 2: Determination of silver,gold,platinum...potassium,chromium and silicon contents—Inductively coupled plasma atomic emission spectrometry - 英文版 |
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GB/T 20975.6-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 6: Determination of cadmium content - 英文版 |
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GB/T 20975.21-2020 Methods for chemical analysis of aluminium and aluminium alloy—Part 21: Determination of calcium content - 英文版 |
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GB/T 20975.17-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 17: Determination of strontium content - 英文版 |
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GB/T 8151.22-2020 Methods for chemical analysis of zinc concentrates—Part 22: Determination of zinc, copper, lead,iron,aluminium ,calcium and magnesium contents—Wavelength dispersive X-ray fluorescence spectrometric method - 英文版 |
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GB/T 8151.23-2020 Methods for chemical analysis of zinc concentrates—Part 23: Determination of mercury content—Solid sampling and direct mercury analysis method - 英文版 |
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GB/T 27894.1-2020 Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 1: General guidelines and calculation of composition - 英文版 |
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GB/T 27894.2-2020 Natural gas—Determination of composition and associated uncertainty by gas chromatography—Part 2: Uncertainty calculations - 英文版 |
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GB/T 11060.8-2020 Natural gas—Determination of sulfur compounds—Part 8：Determination of total sulfur content by ultraviolet fluorescence method - 英文版 |
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GB/T 20975.37-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 37:Determination of niobium content - 英文版 |
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GB/T 4802.4-2020 Textiles—Determination of the fabric propensity to surface pilling, fuzzing or matting—Part 4: Random tumble pilling method - 英文版 |
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GB/T 4893.2-2020 Test of surface coatings of furniture—Part 2: Determination of resistance to wet heat - 英文版 |
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GB/T 4893.3-2020 Test of surface coatings of furniture—Part 3: Determination of resistance to dry heat - 英文版 |
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GB/T 24328.11-2020 Tissue paper and tissue products—Part 11: Determination of optical properties—Measurement of brightness and colour—C/2°(indoor daylight) illuminant - 英文版 |
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GB/T 24328.12-2020 Tissue paper and tissue products—Part 12: Determination of optical properties—Determination of opacity—Diffuse reflectance method - 英文版 |
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GB/T 24328.2-2020 Tissue paper and tissue products—Part 2: Determination of thickness, bulking thickness and apparent bulk density and bulk - 英文版 |
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GB/T 24328.3-2020 Tissue paper and tissue products—Part 3: Determination of tensile strength, stretch at maximum force and tensile energy absorption - 英文版 |
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GB/T 24328.4-2020 Tissue paper and tissue products--Part 4: Determination of wet tensile strength - 英文版 |
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GB/T 24328.6-2020 Tissue paper and tissue products—Part 6: Determination of water-absorption time and water-absorption capacity—Basket-immersion test method - 英文版 |
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GB/T 24328.7-2020 Tisue paper and tissue products—Part 7: Determination of ball burst strength - 英文版 |
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GB/T 24328.8-2020 Tissue paper and tissue products—Part 8: Determination of optical properties—Measurement of brightness and colour—D65/10°（outdoor daylight conditions) - 英文版 |
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GB/T 24328.10-2020 Tissue paper and tissue products—Part 10: Determination of tensile strength of perforated lines and calculation of perforation efficiency - 英文版 |
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GB/T 24328.9-2020 Tissue paper and tissue products—Part 9: Determination of wet ball burst strength - 英文版 |
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GB/T 223.37-2020 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation - 英文版 |
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GB/T 38949-2020 Determination of pore size for porous membranes—Standard particle method - 英文版 |
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GB/T 20975.4-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 4:Determination of iron content - 英文版 |
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