- on ground command
- 按: press; push down
- 地面: the earth's surface; ground
- 口令: word of command; password
- 按地面口令進場著陸: talk-down guided approach
- 按地面圖阻滯的模擬方法: patsim retardant pattern simulation modell; patsim＝ retardant pattern simulation model; patsim＝retardantpatter imulationmodel
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