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GB/T 20243.2-2025 Chinese PDF (GB /T20243.2-2025) GB/T 22249-2024 2-2025_Chinese: Acoustics - Measurement of
GB/T 20243.2-2025 Chinese PDF (GB /T20243.2-2025) GB/T 22249-2024 2-2025_Chinese: Acoustics - Measurement of
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2-2025_Chinese: Acoustics - Measurement of the influence of road surfaces on traffic noise - Part 2: The close-proximity method (Chinese: 声学 道路表面对交通噪声影响的测量 第2部分：近距法)
English versions: GB/T 21099
English versions: GB 1903
GB/T 12789
English versions: GB/T 20882
GB/T 20243.2-2025 Chinese PDF (GB /T20243.2-2025) GB/T 22249-2024 2-2025_Chinese: Acoustics - Measurement ofGB T 20243. 2 2025_Chinese: Acoustics Measurement of the influence of road surfaces on traffic noise Part 2: The close proximity method (Chinese: 2) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 20243. 2 2025
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