采用大口径土钻对间作种植模式下冬小麦与春玉米根系进行取样，分析了两种作物根系的空间分布及动态变化规律。
In this paper, root samples of winter wheat and spring maize under intercropping were taken with large-bore soil auger, and the dynamics of their spatiotemporal distribution were studied.
由分布函数导出的可靠扭矩函数为实现钻削扭矩的在线监测提供了依据。
The reliability torque function derived from distribution function provides basis for achieving on line detection to drilling torque.
同时改变钻具接头的螺纹参数，研究螺距、锥度、牙型角的改变对其应力分布的影响，为钻具接头的生产加工提供参考。
Meanwhile, we change the thread parameters, study the stress distribution caused by changing the pitch, taper and thread Angle, this work can provide a reference for manufacture.
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