搜索 - 科创

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成品倒计时交通灯是通过信号机给出P3-1低电平红灯亮 P3-2黄灯亮 P3-3绿灯亮并根据信号机控制的时间自动修正倒计时的时间我就是不会怎么样根据信号机控制的时间自动修正倒计时的时间。这是我写的手...

楼主的作品可成为··水果刀，至于说是锻造出来的，不能认同，原因是你未曾用炭炉对金属做恒温加热，素材也并非刀具常用钢材，属于高碳钢，以前对刀具有过发言，宁弯不折才是好刀，鉴于作品的长度来说，你无法用工具...

引用第46楼nhlijiaming于2012-09-27 09:32发表的回 44楼(narssin) 的帖子 :谢谢你的建议。看来加个蜂鸣器是必须的~~~做成类似风向标的外形应该可以避免旋转问题请...

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