... quality GPS measuring mu instrumentGPS measuring mu instrument: take a round will know that area of the instrumentInstrument functions: 1, area ... ), 2% (< 50 mu), 1% (100 - acre) Explanation: 1 acres of 5% is 0.05, then measure to be (0.95 ... water, harvester, transplanter, tractor do industry PT-GPS; measuring mu instrument,Area of the measuring instrument,Mu number instrument,Farmland area tester