This is a Engine Tachometer common to many types of General Aviation aircraft. It is color-coded for the Cessna type engine and prop limits. The color coding can be modified as needed for a particular type of aircraft. 塞斯納型飛機轉速表 cessna、engine guage、rpm、tach、tachometer、Transporting Things and People 塞斯納、發動機規格、轉、轉速表、轉速表、運送物品和人 資料來源:openclipart ( https://openclipart.org/ )