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	GB/T 20899.6-2021 Methods for chemical analysis of gold ores—Part 6: Determination of zinc content - 英文版
	GB/T 20899.5-2021 Methods for chemical analysis of gold ores—Part 5: Determination of lead content - 英文版
	GB/T 20899.4-2021 Methods for chemical analysis of gold ores—Part 4: Determination of copper content - 英文版
	GB/T 15224.2-2021 Classification for quality of coal—Part 2: Sulfur content - 英文版
	GB/T 14949.2-2021 Manganese ores—Determination of nickel content—Flame atomic absorption spectrometric method - 英文版
	GB/T 14949.11-2021 Manganese ores—Determination of carbon content—Gravimetric method and infrared absorption method - 英文版
	GB/T 7739.6-2021 Methods for chemical analysis of gold concentrates—Part 6: Determination of zinc content - 英文版
	GB/T 7739.5-2021 Methods for chemical analysis of gold concentrates—Part 5: Determination of lead content - 英文版
	GB/T 7731.5-2021 Ferrotungsten—Determination of silicon content—Silicomolybdenum blue spectrophotometric method - 英文版
	GB/T 7731.4-2021 Ferrotungsten—Determination of phosphorus content—Phosphorus molybdenum blue spectrophotometric method - 英文版
	GB/T 7731.1-2021 Ferrotungsten—Determination of tungsten content—Cinchonine gravimetric method and ammonium nitrate gravimetric method - 英文版
	GB/T 7731.10-2021 Ferrotungsten—Determination of carbon content—Infrared absorption method - 英文版
	GB/T 5687.13-2021 Ferrochromium—Determination of chromium, silicon, manganese, titanium, vanadium, iron contents—Wavelength dispersive X-ray fluorescence spectrometry (fused cast bead method) - 英文版
	GB/T 5195.11-2021 Fluorspar—Determination of manganese content—Periodate spectrophotometry and flame atomic absorption spectrometry - 英文版
	GB/T 223.90-2021 Iron, steel and alloy—Determination of silicon content—Inductively coupled plasma atomic emission spectrometric method - 英文版
	GB/T 40374-2021 Hardmetals—Determination of lead and cadmium content—Flame atomic absorption spectrometric method and inductively coupled plasma atomic emission spectrometry - 英文版
	GB/T 19559-2021 Method of determining coalbed methane content - 英文版
	GB/T 40496-2021 Determination of antioxidant content in jet fuel—High performance liquid chromatography - 英文版
	GB/T 40493-2021 Determination of lead, cadmium, chromium and mercury content in the finishing material of wood-based panel - 英文版
	GB/T 40486-2021 Determination of melittin content in bee venom powder—High performance liquid chromatography - 英文版
	GB/T 40543-2021 Petroleum and natural gas industries—Materials selection for high content CO2 for casing, tubing and downhole equipment - 英文版
	GB/T 40176-2021 Determination of xylobiose in plant-derived products - Hydrophilic intention chromatography - 英文版
	GB/T 40114-2021 Jewellery—Determination of precious metal content—Difference method using inductively coupled plasma optical emission spectroscopy - 英文版
	GB/T 34520.9-2021 Test methods of continuous silicon carbide fibers - Part 9: Carbon content - 英文版
	GB/T 22808-2021 Leather and fur-Chemical tests-Determination of chlorinated phenols content - 英文版
	GB/T 14949.5-2021 Manganese ores一Determination of titanium content一Diantipyrylmethane spectrophotometric method - 英文版
	GB/T 14949.12-2021 Manganese ores - Determination of combined water content - Gravimetric method - 英文版
	GB/T 8243.12-2021 Methods of test for full-flow lubricating oil filters for internal combustion engines—Part 12: Filtration efficiency using particle counting and contaminant retention capacity - 英文版
	GB/T 8152.15-2021 Methods for chemical analysis of lead concentrates—Part 15:Determination of soluble lead content—Flame atomic absorption spectrometry - 英文版
	GB/T 7739.4-2021 Methods for chemical analysis of gold concentrates—Part 4:Determination of copper content - 英文版

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