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GB/T 18115.4-2021 Chemical analysis methods of rare earth impurities in rare earth metals and their oxides -- Part 4: Determination of lanthanum, cerium, praseodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and yt - 英文版 |
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GB/T 12690.7-2021 Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides—Part 7: Determination of silicon content - 英文版 |
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GB/T 40936-2021 Leather—Physical and mechanical tests—Determination of water repellency of garment leather - 英文版 |
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GB/T 39500-2020 Leather—Physical and mechanical tests—Determination of apparent density and mass per unit area - 英文版 |
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GB/T 39507-2020 Leather—Physical and mechanical tests—Determination of abrasion resistance：Martindale ball plate method - 英文版 |
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GB/T 39539-2020 Technical requirements for determination of gas diffusion coefficient in shale reservoir - 英文版 |
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GB/Z 39124-2020 Method for chemical analysis of lead concentrates—Determination of antimony content—Ce(SO4)2 titration method - 英文版 |
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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 39143-2020 Methods for chemical analysis of gold-arsenic alloys—Determination of arsenic content—Inductively coupled plasma atomic emission spectrometry - 英文版 |
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GB/T 39221-2020 Determination for performance of scale inhibitors for reverse osmosis seawater desalination—Recurrent condensation cycle test 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 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 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 24328.8-2020 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 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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GB/T 20975.5-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 5：Determination of silicon content - 英文版 |
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GB/T 20975.7-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 7:Determination of manganese content - 英文版 |
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GB/T 20975.9-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 9:Determination of lithium content—Flame atomic absorption spectrometry - 英文版 |
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GB/T 20975.10-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 10：Determination of tin content - 英文版 |
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