他们不与飞机建立直接的无线电联络，而是同航空公司签派员、航路电台工作人员和机场管制员保持联系。
They had no direct radio link with aircraft but used telephones to stay in touch with airline dispatchers, airway radio operators, and airport traffic controllers.
说明空中交通管制员工作时要进行大量协调沟通工作，管制员资源管理直接影响着空中交通服务的安全和效率。
Controllers have to communicate and coordinate with many people at work, and the air traffic control teamwork directly influences the safety and efficiency of air traffic service.
空中交通管制（ATC）中心系统的效能变化，直接影响到管制员的工作负荷和管制中心所辖空域的交通容量，是ATC系统的关键运行指标。
The system effectiveness of an air traffic control (ATC) center and its variation directly affect the workload of a controller and the capacity of the airspace controlled by the ATC center.
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