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支线航空一般指航距在500公里左右,由70座以下的机型在中小型城市与中心城市之间或中小型城市之间的航班飞行。支线航空运输是航空运输业的重要组成部分,其发展状况
Regional aviation generally refers to a distance of about 500 kilometers, from 70 or less models in the small and medium-sized cities and central cities or small and medium-sized cities between flights. Regional air transport is an important part of the air transport industry, its development