Vertical Angle of maximum candlepower emission.
最大发射光线的垂直角。
Soot formation can be restrained hence the emission of soot can be decreased with the increased injection advance Angle.
增大供油提前角可以减少燃烧过程前期的碳粒生成量，进而降低碳粒排放。
Reduction of the focus hole diameter strongly affects the electrons with large emission angle but its influence on electron focusing is less markedly than the influence of the variations in potential.
减小聚焦极孔径对大发散角的电子有影响，但对聚焦作用的影响不如改变电位明显。
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