对称群特征标是有力的数学工具，研究并提出其简单计算方法是很有意义的。
Characters of symmetry groups is a powerful maths instrument, it is very significative to study and bring forward its simple computation method.
运用活动标架和回转运动群对其啮合方程和啮合效率进行了分析研究；
The meshing equation and the formula of meshing efficiency are drawn by using active coordinate and rotating matrix operators.
给出用特征标构造群码的方法。
Gives a method to construct the group codes by using the character tables.
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