... take a round will know that area of the instrumentInstrument functions: 1, area measurement 2, ... manual measuring automatic measurement 7, backlight design, the same night.Technical parameters:1) area measurement ... (< 50 mu), 1% (100 - acre) Explanation: 1 acres of 5% is 0.05, then measure to be ( ... ; measuring mu instrument,Area of the measuring instrument,Mu number instrument,Farmland area tester ...