The hearings began, and officials from the Civil Aeronautics Board(CAB) were called to testify. 听证开始了;美国民用航空局的官员被召来作证。
Finally, the Civil Aeronautics Board(CAB) cab has jurisdiction over civil aviation, including routes, rates, and subsidies. 最后,民用航空局cab对民航包括航线,运费和津贴有管辖权。