搜索 - 科创

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一种“隐形”飞机设想（肉眼不可见）大家一定有过这样的经验，夏天吹电风扇，扇叶转快了就看不见了，这是因为一种叫做视觉暂留的效应。视觉暂留：人眼在观察景物时，光信号传入大脑神经，需经过一段短暂的时...

美军准备实施JMR-FVL计划，贝尔公司推出V-280方案，AVX公司推出JMR-AT方案，西科斯基和波音公司推出UTX-BA方案，参与竟争。我个人认为，UTX-BA方案最好，JMR-A...

最近淘宝上看到一种绿色环蚀刻剂在卖，用来蚀刻覆铜板形成线路用的。蓝色环保蚀刻剂的成分我们清楚的，是过硫酸铵或过硫酸钠，因为反应生成硫酸铜呈蓝色而得名。这种绿色环保蚀刻剂，却没有见过，下...

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