公交车用的感应磁卡是什么原理?公交车卡放上打卡机,会响一下.如卡上原有10元,然后卡上的金额就减少到9元了.下车后,上另一辆公交车,卡上的金额就减少到8元了,这是什么原理呢?两辆公交车
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![公交车用的感应磁卡是什么原理?公交车卡放上打卡机,会响一下.如卡上原有10元,然后卡上的金额就减少到9元了.下车后,上另一辆公交车,卡上的金额就减少到8元了,这是什么原理呢?两辆公交车](/uploads/image/z/11922756-60-6.jpg?t=%E5%85%AC%E4%BA%A4%E8%BD%A6%E7%94%A8%E7%9A%84%E6%84%9F%E5%BA%94%E7%A3%81%E5%8D%A1%E6%98%AF%E4%BB%80%E4%B9%88%E5%8E%9F%E7%90%86%3F%E5%85%AC%E4%BA%A4%E8%BD%A6%E5%8D%A1%E6%94%BE%E4%B8%8A%E6%89%93%E5%8D%A1%E6%9C%BA%2C%E4%BC%9A%E5%93%8D%E4%B8%80%E4%B8%8B.%E5%A6%82%E5%8D%A1%E4%B8%8A%E5%8E%9F%E6%9C%8910%E5%85%83%2C%E7%84%B6%E5%90%8E%E5%8D%A1%E4%B8%8A%E7%9A%84%E9%87%91%E9%A2%9D%E5%B0%B1%E5%87%8F%E5%B0%91%E5%88%B09%E5%85%83%E4%BA%86.%E4%B8%8B%E8%BD%A6%E5%90%8E%2C%E4%B8%8A%E5%8F%A6%E4%B8%80%E8%BE%86%E5%85%AC%E4%BA%A4%E8%BD%A6%2C%E5%8D%A1%E4%B8%8A%E7%9A%84%E9%87%91%E9%A2%9D%E5%B0%B1%E5%87%8F%E5%B0%91%E5%88%B08%E5%85%83%E4%BA%86%2C%E8%BF%99%E6%98%AF%E4%BB%80%E4%B9%88%E5%8E%9F%E7%90%86%E5%91%A2%3F%E4%B8%A4%E8%BE%86%E5%85%AC%E4%BA%A4%E8%BD%A6)
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