该控制器用于给出每一楼层的呼叫请求信息，并显示电梯当前运行情况。
This controller uses in producing each floor the call to request the information and demonstrating elevator current movement situation.
正在完成通知更改请求，而且信息没有返回到呼叫方的缓冲区中。
A notify change request is being completed and the information is not being returned in the caller's buffer.
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