电子系统理论上是永不磨损的。机械系统才会有故障。

来源: 中部于 2011-05-29 04:33:51 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.