軌道帶電，可以隨時斷電，電池就不能夠隨時斷電，所以電池可能不如軌道輸電安全

來源: 547788 於 2017-02-23 20:22:36 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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