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GB/T 34877.2-2023 Industrial fans - Determination of fan sound power levels under standard laboratory conditions - Part 2: Reverberation chamber method - 英文版 |
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GB/T 34877.1-2023 Industrial fans - Determination of fan sound power levels under standard laboratory conditions - Part 1: General requirements - 英文版 |
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GB/T 43358-2023 Rare earth ores and rare earth products Determination of total alpha and total beta radioactivity Thick source method - 英文版 |
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GB/T 6881-2023 Acoustics - Determination of sound power level and sound energy level of noise sources by sound pressure method - Reverberation chamber precision method - 英文版 |
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GB/T 18950-2023 Rubber and plastic hoses. Laboratory test methods for exposure to light sources. Determination of changes in color, appearance and other physical properties. - 英文版 |
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GB/T 42794-2023 Nickel iron - Determination of carbon, sulfur, silicon, phosphorus, nickel, cobalt, chromium and copper content - Spark source atomic emission spectrometry - 英文版 |
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GB/T 1094.101-2023 Power transformers - Part 101: Determination of sound levels - Application guidelines - 英文版 |
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GB/T 3222.2-2022 Acoustics—Description, measurement and assessment of environmental noise—Part 2: Determination of sound pressure levels - 英文版 |
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GB/T 17248.1-2022 Acoustics—Noise emitted by machinery and equipment—Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions - 英文版 |
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GB/T 19889.2-2022 Acoustics—Measurement of sound insulation in buildings and of building elements—Part 2 : Determination and application of measurement uncertainties - 英文版 |
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GB/T 1094.10-2022 Power transformers - Part 10: Determination of sound levels - 英文版 |
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GB/T 40302-2021 Plastics—Determination of burning behaviour of thin flexible vertical specimens in contact with a small-flame ignition source - 英文版 |
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GB/T 15596-2021 Plastics—Determination of changes in colour and variations in properties after exposure to glass-filtered solar radiation, natural weathering or laboratory radiation sources - 英文版 |
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GB/T 5169.46-2020 Fire hazard testing for electric and electronic products—Part 46: Test flames—Determination of the characteristic heat flux for ignition from a non-contacting flame source - 英文版 |
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GB/T 5494-2019 Inspection of grain and oils—Determination of foreign matter and unsound kernels of grain and oilseeds - 英文版 |
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GB/T 17248.2-2018 Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections - 英文版 |
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GB/T 17248.3-2018 Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions applying approximate environmental corrections - 英文版 |
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GB/T 17248.5-2018 Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions applying accurate environmental corrections - 英文版 |
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GB/T 6881.2-2017 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for small movable sources in reverberant fields—Comparison method for a hard-walled test room - 英文版 |
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GB/T 34766-2017 Determination of total humic acid content from mineral source - 英文版 |
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GB/T 34877.3-2017 Industrial fans—Determination of fan sound power levels under standardized laboratory conditions—Part3:Enveloping surface methods - 英文版 |
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GB/T 35106-2017 Determination of unbound humic acid content from mineral source - 英文版 |
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GB/T 3768-2017 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Survey method using an enveloping measurement surface over a reflecting plane - 英文版 |
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GB/T 3767-2016 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for an essentially free field over a reflecting plane - 英文版 |
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GB/T 32524.2-2016 Acoustics—Determination of sound power level and directivity character of power capacitor using sound pressure—Part 2: Engineering methods for an essentially free field over a reflecting plane - 英文版 |
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GB/T 32524.1-2016 Acoustics—Determination of sound power level and directivity character of power capacitor unit using sound pressure—Part 1: Precision method for hemi-anechoic rooms - 英文版 |
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GB/T 6882-2016 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Precision methods for anechoic rooms and hemi-anechoic rooms - 英文版 |
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GB/T 32064-2015 Determination of thermal conductivity and thermal diffusivity of building matertials：transient plane heat sourse method - 英文版 |
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GB/T 17697-2014 Acoustics―Determination of sound power radiated into a duct by fans and other air-moving devices―In-duct method - 英文版 |
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GB/Z 27764-2011 Acoustics - Determination of sound transmission loss in impedance tubes - Transfer matrix method - 英文版 |
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