They tested algebra, geometry, data analysis and number concepts.
调查人员选取了代数、几何、数据分心和数理概念进行测试。
Based on the analysis of geometry parameters and contact stresses of the deep groove ball bearings, the control equation of groove curvature radius has been drawn out.
在对深沟球轴承几何参数及接触应力分析的基础上，给出了沟曲率半径系数的控制方程，并对轻、中、重系列轴承的外圈沟曲率半径系数的选取进行了探讨。
Using differential geometry and vector analysis, a new tool-path generation method for freeform surface machining is presented.
以微分几何学和矢量分析为工具，提出了复杂曲面加工路径规划的新方法。
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