RCS (radar Cross Section) is a key factor in designing stealth weapons, so the research of radar targets scattering characteristics has become the foundation of stealth technologies.
雷达散射截面(RCS)是隐身装备外形设计的一项重要指标，研究雷达目标的电磁散射特性已成为目标隐身设计和目标识别的基础。
The position of the least square center for a cross section in the absolute coordinate system is an important factor that affects cylindrical form errors.
截面最小二乘圆心在绝对坐标系内的位置是影响圆柱度形状误差大小的重要因素。
Influence of each factor on blade inlet flow of a large vertical axial-flow pump is analyzed, formation mechanism of flow field in the cross section is studied.
分析各因素对大型立式轴流泵叶片进口流态的影响，研究该断面流场的形成机理。
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