短語詞組短語longitudinal wave vibration 縱振longitudinal free vibration 縱向振動longitudinal -vibration transducer 縱向振動換能器longitudinal coupling vibration 縱向耦合振動longitudinal shrinking vibration 縱向振動longitudinal natural vibration 固有縱振longitudinal shrinking vibration characteristics 縱向振動特性longitudinal resonance vibration 縱向共振longitudinal torsion vibration 縱扭振動 返回 longitudinal vibration