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NY/T 1977-2010 《Water-suluble fertilizers-Determination of total nitrogen, phosphorus and potassium content》
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HJ 636-2012 《Water quality.Determination of total nitrogen.Alkaline potassium persulfate digestion UV spectrophotometric method》
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HJ/T 102-2003 《The technical requirement for water quality automatic analyzer of total nitrogen》
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GB 18584-2024 《Limit of harmful substances of furniture》
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GB/T 44155-2024 《Steel forgings—Testing frequency, sampling conditions and test methods for mechanical properties testing》
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GB/T 44154-2024 《Metallic and other inorganic coatings—Requirements for the designation of metallic and inorganic coatings》
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GB/T 44152-2024 《Ultrasonic testing method for ends of seamless steel tube》
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GB/T 44150-2024 《Metallic and other inorganic coatings—Electrodeposited zinc alloys with nickel, cobalt or iron》
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GB/T 44149-2024 《Fine ceramics—Measurement of iso-electric point of ceramic powders—zeta potential method》
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GB/T 44148.3-2024 《Steel forgings and rolled or forged bars for pressure equipments—Part 3: Nickel steels with specified low temperature toughness》
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GB/T 44148.2-2024 《Steel forgings and rolled or forged bars for pressure equipments—Part 2: Low-alloy and alloy（Mo，Cr and CrMo） steels with specified elevated temperature properties》
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GB/T 44148.1-2024 《Steel forgings and rolled or forged bars for pressure equipments—Part 1: General requirements》
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GB/T 24820-2024 《General technical requirements for laboratory furniture》
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GB/T 19822-2024 《Specification for hard anodic oxidation coatings on aluminium and its alloys》
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GB/T 6730.88-2024 《Iron ores—Determination of chlorine content—X-ray fluorescence spectrometric method》
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GB/T 609-2018 《Chemical reagent—General method for the determination of total nitrogen》
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GB/T 11420-2024 《Vitreous and porcelain enamels—Test method of specular glossiness》
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GB/T 14949.7-2024 《Manganese ores—Determination of sodium and potassium content—Flame atomic absorption spectrometric method》
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GB/T 16477.1-2024 《Chemical analysis methods of silicon-based rare earth ferroalloy and RE-Mg ferro-silicon alloy—Part 1: Determination of total rare earth and fifteen rare earth elements contents》
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GB/T 26527-2024 《Silicone defoaming agent》
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GB/T 28629-2024 《Methods for chemical analysis of free silicon dioxide in cement clinker》
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GB/T 29284-2024 《Poly (lactic acid)》
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GB/T 38216.5-2024 《Steel slag―Determination of manganese oxide content—The flame atomic absorption spectrometric method》
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GB/T 40344.3-2024 《Vacuum technology—Standard methods for measuring Vacuum Pump performance—Part 3: Specific parameters for mechanical booster Vacuum Pumps》
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GB/T 4074.1-2024 《Test methods of winding wires—Part 1:General》
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GB/T 4074.2-2024 《Test methods of winding wires—Part 2:Determination of dimensions》
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GB/T 4074.3-2024 《Test methods of winding wires—Part 3: Mechanical properties》
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GB/T 4074.4-2024 《Test methods of winding wires—Part 4: Chemical properties》
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GB/T 4074.5-2024 《Test methods of winding wires—Part 5: Electrical properties》
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GB/T 4074.6-2024 《Test methods of winding wires—Part 6: Thermal properties》