过去，护路设备占用错误轨道或阻塞相邻车道是造成重大事故的原因。
The presence of MOW equipment either occupying the wrong track or fouling an adjacent track has been the cause of serious accidents in the past.
选定的线路或地址正被其他程序或设备占用。
The selected line or address is in use by another program or device.
选定的线路或地址正被其他程序或设备占用。此时还不能安排您的呼叫。请稍后重新呼叫。
The selected line or address is in use by another program or device. Your call could not be placed at this time. Try your call again later.
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