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由Chang Soo Lee设计的安全充电插头,类似一个魔方,表面分成9块,每块下面都有一个LED灯。给手机充电时,可通过LED灯来判断充电进展:亮2个灯代表已充电10%,5个灯代表已充电50%,全亮则已充满。而当它充满时,魔方 ...
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