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noise and number index
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earth.sc.
噪声及数值指数
ecol.
噪声和次数指数
otorhinol.
噪声机数指数
space
噪扰指数
(一种噪声测定标准)
tech.
噪声量指数
;
噪声及次数指标
;
噪声和数值指数
Noise and Number Index
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avia.
噪扰指数
noise and number indexes
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geophys.
噪声和数值指数
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