There is no complete, systematic simulation available in procedure control because of discon-nection among tower control service, approach control service and area control service.
程序管制模拟练习
，
着塔台管制服务、进近管制服务和区域管制服务互不衔
，不能系统地模拟整个管制过程的问题。
There is no complete, systematic simulation available in procedure control because of discon-nection among tower control service, approach control service and area control service.
程序管制模拟练习，着塔台管制服务、进近管制服务和区域管制服务互不衔，不能系统地模拟整个管制过程的问题。
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