您要查找的是不是：
- air traffic clearance limit 由地面到飞机控制的区域界限
- The pilot was given clearance to land by air traffic control. 飞行员得到空中交通管制站发出的着陆许可。
- We are still waiting for clearance from Air Traffic Control. 我们仍在等待来自航空交通控制部门的批准。
- 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。
- Obstacle clearance limit is 150m. 超越障碍物许可高度150米。
- air traffic clearance 航空交通批准证,由地面到飞机控制的区域
- Air traffic controllers were in radio contact with the aircraft. 空中交通调度员通过无线电和飞机保持联络。
- Owing to the heavy air traffic, we'll wait until a take-off clearance is given. 由于空中航路拥挤,我们要等待通行许可才能起飞。
- The French air traffic controllers are on strike so my trip to Paris is up the spout. 法国空中交通管理人员在罢工，因此我的巴黎之行落空了。
- Air traffic control has been privatized. 空中交通管制已经私有化。
- European Air Traffic Controller Licensing Project. 欧洲空管员执照计划。
- The controlled air traffic space near an airport. 机场附近受控制的空中交通空间
- What does it take to be an air traffic controller? 怎样才能成为一名空中交通管制人员呢?
- Air traffic continues to grow steadily. 航空交通量持续稳定增长。
- The clearance limits are as specified in ISO 5753:1991. 游隙极限值符合ISO 5753:1991的规定。
- The exclusive right of a country to operate the air traffic within its territory. 领空权一个国家所专有的在其领空内进行领空交通的权利
- Timesharing of several tasks is common in air traffic control. 在空中交通管制中，在不同的任务间合理分配时间是很常见的。
- Increasing air traffic demand has added to the problem. 航空交通需求日增，使问题百上加斤。
- 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。
- 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。
