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Signal attenuation in the power line environment is often great, and unpredictable.
信号衰减在输电线环境经常是伟大和变化莫测的。
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If there is no attenuation the line will be flat.
如果没有衰减线将是平的。
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If there is no attenuation the line will be flat.
如果没有衰减线将是平的。
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