搜索 - 科创

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在场的人介绍说这枚液体火箭是1980年左右制造的。制造者之一已经去世。他们买过来改装争取14年2月份发射。没有独立的加压气罐，氮气预先打入燃料罐。燃料和氧化剂我没太听懂，不过好像是N20和类...

制作感光板主要分为以下4步：1：制作原稿(我用的是硫酸纸，喷墨打印机。普通打印纸也行，注意感光时间）2：感光（普通台灯）3：显像（氢氧化钠，专用显影剂也行）4，蚀刻（三氯化铁或者环保蚀刻剂）以下是我的...

其实也不能说是两个收发机，因为一个是收发机，一个是接收机。左边的是＂皮鞋＂收发机，没安电键接头，原因是因为没有电键，而且我也没有呼号，不能发射。。。。拉了条8米的线作为天线（大概有5米是卷成线圈状的）...

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