搜索 - 科创

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注意事项： 1.联系方式qq569452195 2.没有淘宝，也没有支付宝，只有建行卡，人在北京可见面交易，其余地区只接受先款交易 3.价格不包含运费，默认发顺丰，也可以发廉...

1 请懂行的介绍下..我想分别知道低速..中速快速..高速等的开关速度.2.还有在电路图里有时能看到DB3这各触发管..而我在接12V电瓶中.在可控硅触发脚接入电阻也很容易让可控硅导通...我想知道...

国庆前一天放假，正好没事，说去本地HAM店看看有啥最新的设备。本来今年5月打算买FT1D回来玩玩，当时由于没货就没买成，这回顺便去再研究一下。到了店里，问老板拿出FT1D，老板很兴奋的问，你也是听...

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