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Two identical chillers and four identical pumps are installed in a plant room. When in operation, the sound pressure level of one single chiller is

Two identical chillers and four identical pumps are installed in a plant room. When in operation, the sound pressure level of one single chiller is 95 dB; the sound pressure level of one single pump is 80 dB. Calculate the total sound pressure level when the two chillers and the four pumps are in operation at the same time.

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