刷卡时屏幕会显示一个箭头，有时是蓝色，有时是绿色。分别代表什么意思呢？
This topic created in 2938 days ago, the information mentioned may be changed or developed.
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donglongfei2008 May 29, 2018
最近刚刚发现这样，不得其解
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