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信号衰减在输电线环境经常是伟大和变化莫测的。
Signal attenuation in the power line environment is often great, and unpredictable.
youdao
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建立了目标噪声信号传播和衰减的数学模型。
Build target acoustic signal's transmission and attenuation math model.
youdao
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建立了目标噪声信号传播和衰减的数学模型。
Build target acoustic signal's transmission and attenuation math model.
youdao