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GB/T 34877.4-2024 Chinese PDF (GB/T34877.4-2024) GB/T 14598.1871-2024 English versions: GB/T 45128-2025

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English versions: GB/T 45128-2025

English versions: GB/T 34575-2023

English versions: GB/T 2910

English versions: GB/T 36306-2024

GB/T 34877.4-2024 Chinese PDF (GB/T34877.4-2024) GB/T 14598.1871-2024 English versions: GB/T 45128-2025GB T 34877. 4 2024_Chinese: Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 4: Sound intensity method (Chinese: 4) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB T 34877. 4 2024

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