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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5. 有限求和项数 $N$ 对波形计算结果的影响 | 
| Fig.5. The influence of finite summation terms $N$ on the calculation results of waveforms | 
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