ground-to-plane radio station 地空通信无线电台
Another pilot on the ground at the heliport saw the plane approaching and tried to radio an alert to the helicopter above. But the warning was either not heard, or failed to get through in time.
另一名驾驶员在机场地面看到小型飞机向直升机飞近，他设法用无线电紧急警告上空的直升机驾驶员，但他可能没有听到，或听到时为时已晚。
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