Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
터보샤프트는 헬리콥터의 엔진에서 중요한 역할을 합니다.teobosyapeuteun hellikopteoui enjineseo jungyohan yeokhal-eul hamnida.The turboshaft plays an important role in the helicopter's engine.