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/ )