About OGURA Y
About Hitachi, Ltd., Tokyo, JPN
About KATAKURA K
About Hitachi, Ltd., Tokyo, JPN
About OKUJIMA M
About Toin Univ. Yokohama, Yokohama, JPN
About IEEE Transactions on Biomedical Engineering
About ultrasonic velocity
About Acoustical measurements and instrumentation
About 計算
About 超音波音速
About 計測法