acoustic load声负载acoustic material隔声材料acoustic mechanical efficiency声机械效率acoustic power声功率acoustic pre ure声压acoustic radiation pre ure声辐射压acoustic reactance声抗acoustic resistance声阻acoustic resonance共识acoustic velocity声速acoustical声的acoustical wave声波acting force织力action at distance超距酌action center运动中心action integral酌积分action of deflagration爆燃酌action of force力的酌action principle酌原理action here酌区action turbine冲唤涡轮action variable酌变量action wave酌波activation活化active earth pre ure织土压active flight织飞翔active force织力active gas活性气体active load reaction有功负载反酌active pre ure织压力activity of force力功率actual load实际载荷actual stre实际应力
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