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一个和一个是指什么?那么每层电梯间都会有两套上下按钮,一个呼叫1车厢,一个呼叫2车厢,除了最底层和最高层。在高客流写字楼里效率高一点点,但控制麻烦,走错车厢可能去不了最底或最高层。

mildkiller (爱,已成往事)
(#340743@0)
2002-1-20 -04:00
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