On the same time, this study has great theoretical significance and practical value to improving the performance of the combine, promoting replace of products and developing the new threshing unit.
此外，本课题对于改善我国联合收割机性能，促进产品的更新换代，以及新型脱粒装置的研制和开发具有很好的理论意义和实用价值。
The study also goes to the influence, upon stress waves, of the piles relaxation time, the equivalent viscous damping coefficient of soil around the pile and the unit rigidity of soil below the pile.
同时，分析了桩身驰豫时间、桩侧土的等效粘滞阻尼系数、桩底土的单位刚度等因素对应力波的影响。
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