搜索 - 科创

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引用第14楼chiataimakro于2009-01-13 17:43发表的 :个人认为理论是复杂的，在实践中把火箭做到和理论的标准一致是昂贵的，检验理论和实际的误差是费力伤神的，发这种帖子是雷人的...

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本帖最后由老年梦工厂于 2014-2-4 16:01 编辑 gaifeng 发表于 2014-2-4 15:27 楼主是钳工吗？手艺太好了，立柱式什么东西做的呢，还有手轮里面是什么传动方式，上下...

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