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		梯形应力脉冲在弹性杆中的传播过程和几何弥散1)
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			THE PROPAGATION PROCESS AND THE GEOMETRIC DISPERSION OF A TRAPEZOIDAL STRESS PULSE IN AN ELASTIC ROD 1)
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| 图9. 泊松比的变化对脉冲波形的影响 ($\bar {\alpha } = 0.004$,$\bar {x} = 5)$ | 
| Fig.9. The effect of variation of Poisson's ratio on pulse waveforms ($\bar{\alpha } = 0.004$,$\bar {x} = 5)$ | 
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