Helicopter service acts as stepping stone toward age of urban air mobi… stocking 0 3 06.11 13:58 https://youtu.be/fOFVD2ymnQ0 + 0 교통 체증 속 주목받는 UAM을 향한 첫 발걸음 도심내 항공서비스 운행 We are getting closer step by step to drone taxis and ...