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1·Results show that if the cross-section of the axicon is ideally manufactured in circular symmetry, the field distribution behind the axicon is approximately an ideal Bessel beam.

计算结果指出，当轴棱锥的截面为圆对称的理想加工时，轴棱锥产生的光场分布为近似理想的零阶贝塞耳光。

2·Based on symmetry of the circular light spot of the laser, a two dimensional numerical simulation of temperature fields of laser molten pool has been developed.

利用激光圆形光斑对称性的特点，建立了激光表面快速熔凝条件下温度场的二维数值模型。

3·According to the symmetry of the circular array, the algorithm for solving the general impedance matrix assignment of MOM is presented to save computational time.

根据圆阵的对称性，给出了在矩量法中对广义阻抗矩阵赋值的算法以节省计算时间。

4·Lobby: The lobby is open bright, up and down to form a circular pattern symmetry, so that customers look and feel comfortable.

大堂开阔明朗，上下圆形图案形成对称美，让客户观感舒适。

5·The flexural vibration of a circular ring that is of axis symmetry is analyzed and calculated, the solid frequency expression of the flexural vibration is obtained.

对一类轴对称圆环的面内弯曲振动进行了分析计算，给出了圆环面内弯曲振动固有频率表达式。

6·In measuring circular indexing error with symmetry-relation method, the author tries to operate with a microcomputer.

本文给出用对称联系法解圆分度误差时。