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EVALUATION OF ATTENUATION OF ULTRASONIC WAVE IN AIR TO MEASURE CONCRETE ROUGHNESS USING AERIAL ULTRASONIC SENSOR. INTERNATIONAL JOURNAL OF GEOMATE [Internet]. 2018 Feb. 27 [cited 2026 Aug. 25];14(42):158-63. Available from: https://geomatejournal.com/geomate/article/view/972