搜索 - 科创

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对不起，我弄错型号了，珠子型号是10mm的，其他关键字不变，至于线可以用，只是我个人习惯觉得细了，而数量的话100g10mm的珠子只有约100颗，所以做一个笔筒的话大约就要买400g的样子。用8mm...

接下来说下这些知识可以在哪里系统学习：线性代数可以参考同济大学的线性代数，我就是看这本的，不过是真的烂啊，把初学者当欧拉还是牛顿啊！bilibili应该有些教程，我没看过，自己参考吧。欧拉角的定义就看...

[quote]引用第21楼usercim于2009-08-04 18:57发表的 :拉瓦尔对于金属发动机是有用的,对于喷管腐蚀很严重的..........别白费功夫了quote]说的对，我使用水泥做...

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