搜索 - 科创

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最近我们这里放寒假了，足足7天，忙里偷闲逛kc。看到之前自己发的文章，我有点伤感，我发现好多过去熟悉知识我都有点生疏了。之前搞物竞往前学了这么多，而且也觉得在这种学习中很开心，但最后还是在最关键的时候...

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡话不多说切入主题：Re：球状发动机药柱计算方法：上公式（推公式推得半死）燃烧面积=sinβ×cosβ×R²×12.56

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