Initial control for space Interception was studied by differential correction method.
对于空间拦截控制，利用微分修正法进行初始控制。
First, trajectory design of the lunar probe was discussed based on differential correction.
首先，讨论基于微分改正的月球探测器轨道设计方法。
The precision of liquid column manometer was described. The correct use method and error correction of U tube manometer and double tube differential pressure gauge were analysed.
叙述了液柱式压力计的精度，对U形管压力计和双管差压计的正确使用方法及误差修正做了简要分析。
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