搜索 - 科创

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带孔的是为了增大表面积，提高燃速推力，不过相应的工作时间也会短一些，总之大一点的固态火箭药柱基本带孔，而且是星孔——小火箭圆孔是钻的，星孔就要靠浇筑了至于隔火，很多耐火材料都可以啊，其实小火箭普通的纸...

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