undamped system 无阻尼系统...undamped natural frequency 无阻尼自然频率...undamped wave transmission 等幅波发射...undamped a.未受潮的,不灰心的,不失望...undamped oscillations 无阻尼振荡...undamped vibration 无阻尼振动...undamped wave 等幅波...
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