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[多選題] 各礦井調度室要建立便捷暢通的調度通訊系統。調度臺應有公網電話、內部行政電話、傳真機、值班手機。集團公司及各基層調度室至少要配備2部值班手機，作為備用通信聯系方式?！ 、 內部行政電話 B、 傳真機 C、 值班手機 D、 5G可視電話...
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