air traffic

• Air traffic control communication system
  航空交通管制信号方式
• Regular air traffic links xian to the rest of the country
  定期班机把西安和全国其他地方连接起来。
• Maintaining safe , orderly and expeditious flow of air traffic
  维持既安全、快捷又秩序井然的航空交通
• Temporary air traffic control officers
  临时航空交通管制主任
• A preliminary study of air traffic controller ' s personality characteristics
  管制员个性特征的调查研究
• Regular air traffic links london to the rest of the country
  定期班机把伦敦和全国其他地方连接了起来。
• Air traffic control proficiency training
  飞航管制专精训练