投币式手机充电仪（另一个版本） 分为时间显示和金额显示两部分 根据投入的金额显示两倍时间，可随时清零，确定后倒计时，结束后自动返回初始状态(Coin-operated mobile phone charger(Another version) It is divided into two parts: time display and amount display. According to the amount of input, it shows twice the time. It can