无控火箭的老大难问题是散布大，射击精度差。
It has been a big and difficult problem that the uncontrolled rocket has large dispersion and low firing accuracy.
无控火箭武器存在的一个主要问题是落点散布大，精度低。
The key problems of rocket weapons are low precision and broad falling point.
本文在理论计算分析和试验研究的基础上提出了提高无控火箭密集度的一个途径，即阶梯推力方案。
On the basis of theoretical calculation analysis and experiment research, the paper proposes a new raising non-con-control rocket distrubution way. which is a step propulsion plan.
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