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.
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.
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。
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