The length of trajectory, the number of grindingmarks and the stable grinding period were deduced.
在运动学的基础上推导了磨纹长度、磨纹数量以及磨削稳定周期公式。
2
The relationship between grindingmarks and the grinding parameters is analyzed. The cutting trajectories of grits on the wafer are predicted by computer simulation.
Other clues to dinosaur diet besides teeth and jaws are fossilised dung and stomach contents, teeth marks and the presence of 'mill stones' in the stomach for grinding vegetation.