low flying rules
低空飞行规则
以上为机器翻译结果,长、整句建议使用 人工翻译 。
Tall buildings pose an obvious danger to low-flying aircraft, but here too there are strict rules to minimise pilots' risk.
BBC: London helicopter crash: What are the rules for pilots?
应用推荐
模块上移
模块下移
不移动