Based on the assumption of uniform distribution of single target, the fire efficiency assessment model of single cluster ammunition attacking group targets was set with discrete method.

在假定单个目标均匀分布的基础上，运用离散的方法研究并建立单发子母弹对集群目标射击的效率评定模型。

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We have been told that amongst the kinds of ammunition being fired from these huge guns are effectively cluster bombs, called L20 bomblet rounds.

BBC: Basra civilians in firing line