The size and number of steel wheel lug's holes, formed within the same distance, reflect directly its motionresistance when rolling in paddy field.
水田铁轮在水田中滚动时，在相同区段上所形成的刺孔的大小与多少直接影响共滚动阻力的大小。
2
The rolling motionresistance of running automobile are expounded, and a method for testing the rolling motionresistance of running automobile is introduced in this paper.
论述汽车行驶工况的滚动阻力， 介绍一种测试汽车滚动阻力的方法。
3
Besides this paper discusses the sorting principle of micro diameter glass bead and brings forward sorting roundness with motionresistance and knocked-on reflection principle.