(1)
Nagaoka Seiya; Islam Mohammad Raihanul; Okajima Kenji; Ishiguro Satoru; Ito Ryoei; Watanabe Ken; Ito Tetsu. MEASUREMENT OFARITHMETICAL MEAN ROUGHNESS OF CONCRETE BY TRANSCEIVERTYPE AERIAL ULTRASONIC SENSOR. INTERNATIONAL JOURNAL OF GEOMATE 2017, 13, 61-66.