搜索 - 科创

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本帖最后由乐星空于 2013-10-27 22:11 编辑不知论坛上有没有人发过，这个文件感觉不错，放在一起用”好压“解压，另送A380大体结构图

问题1：我在一个帖子里看到，普通PVC管材喷燃比应该在100到200之间。我的喷口直径为4MM，要保证初始时有足够推力，药柱就得100MM长。但是我发现如果药柱长为100MM，燃烧到后期是喷燃比会达到...

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