United flight dispatch first send out its own search party, without success.

联航飞行调度处先是派出了它自己的搜索队，但是没有找到。

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Familiar with method and procedure of operation control and flight dispatch;

熟悉运行控制、飞机调配的方法与程序；

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Familiar with method and procedure of operation control and flight dispatch;

熟悉运行控制、飞机调配的方法与程序；

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