在额定电流范围内能限制最大使用功率；电卡能双向传递数据；电量为零时，自动拉闸断电。
In the scope of internal limits maximum rated current power, Electricity can transfer data bidirectional, Electricity is zero, automatic switch off.
在额定电流范围内能限制最大使用功率；电卡能双向传递数据；电量为零时，自动拉闸断电。
In the scope of internal limits maximum rated current power, Electricity can transfer data bidirectional, Electricity is zero, automatic switch off.
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