About NAKAO AKIMASA
About NARA YOSHITAKA
About MURATA SUMIHIKO
About ISHIDA TSUYOSHI
About KANEKO KATSUHIKO
About 日本材料学会学術講演会講演論文集
About velocity
About sandstone
About temperature control
About humidity control
About ultrasonic transmission method
About ultrasonic pulse
About dependence
About water content
About expansion
About density
About P wave (seismic wave)
About velocity measurement
About pulse method
About P wave speed
About crack density
About humidity dependency
About Physics of the earth's interior in general
About 湿度制御
About 砂岩
About P波速度