In 1919, the International Commission for Air Navigation (ICAN) was created to develop General Rules for Air Traffic.
1919年，国际航空委员会(ICAN)成立，并开始制定空中交通通用规则。
In 1919, the International Commission for Air Navigation (ICAN) was created to develop General Rules for Air Traffic.
1919年，国际航空委员会(ICAN)成立，并开始制定空中交通通用规则。
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