The length of trajectory, the number of grinding marks 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。
The relationship between grinding marks and the grinding parameters is analyzed. The cutting trajectories of grits on the wafer are predicted by computer simulation.
本文建立了硅片自旋转磨削的运动几何学模型，分析了磨削参数与磨削纹理的关系，并对磨粒磨削运动轨迹进行了计算机仿真和预测；
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.
除了牙齿和下巴之外，能为猜测恐龙的食谱提供其它线索的就还有粪便化石胃摄入物，牙印以及胃中出现的“碎石”，这些都是支持他们草食性的证据。
You need to sand grinding into the ground inside the particles can not be seen by the naked eye marks.
需要将地面内的沙石打磨到无法通过肉眼看到颗粒的痕迹。
You need to sand grinding into the ground inside the particles can not be seen by the naked eye marks.
需要将地面内的沙石打磨到无法通过肉眼看到颗粒的痕迹。
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