The reason is that soonest at the next current zero-crossing the firing pulse of thyristors can be reset.
通常的短路故障电流会大大高于这个倍数，而软启动器的晶闸管本身是没有短路分断能力的。
The data measured by magnetic sensor can be used in calculating the flight attitude of the projectile and giving the direction benchmark of firing pulse jet.
地磁传感器测量的数据不仅用于解算弹体飞行姿态，同时可通过计算给出点火脉冲发动机选择的方向基准。
They also abandoned using any corrective lenses, firing the X-ray pulse through a pinhole and then collecting the diffracted rays after they pass through the sample.
他们也放弃使用任何矫正透镜，而是通过一个针孔发射X光射线，然后采集经过样品后的衍射光线。
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