CAO = Civil Aviation Organization

• 民航组织

CAO = Civil Aviation Organization的用法和样例：

例句

1. ICAO requires flight crew to be able to recognise the primary signal aviation colours of red, green and white, with blue and yellow as supplementary colours.
   国际民航组织要求机组人员能够识别的信号航空的主要颜色的红，绿，白色，蓝色和黄色作为辅助颜色。