But as experiment time increases, the effect of increasing friction for driving drum with concave covering-layer is decreased, and much lower than the driving drum with convexity covering-layer.

但是凹坑形仿生非光滑传动滚筒随着实验时间的增长，其增摩效果受到一定的影响，效果不如凸包形仿生非光滑传动滚筒。

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There has been increasing friction between the two sides since an internal airport business review was leaked to the union in October 2001.

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His thesis is that Europe's increasing friction with the U.S. is a natural outgrowth of the second-fiddle role the continent is destined to play in world affairs.

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Lead scientist Professor Nicholas Spencer suspected that this property could neutralise the effectiveness of the synovial fluid as a lubricant - increasing friction and wear in the hip implant.

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