The five points difference method is used to calculate the voltage distribution on the meridian surface of axial-symmetrical electrostatic lens.
采用五点差分法计算轴对称静电透镜子午面上电位分布，再从普遍轨迹方程求得的电子轨迹出发得到透镜焦点和球差。
Based on research on available electrostatic spray painting equipment, grid electrode used as high voltage electrode for electrostatic coating on food surface.
在研究已有的静电喷涂装置基础上，采用栅网电极作为食品表面静电涂敷高压电极。
Shell made of high strength aluminum alloy casting off the surface after blast cleaning by high voltage electrostatic spray.
壳体采用高强度合金铝一次性压铸成型，表面经高速抛丸清理后高压静电喷塑。
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