About NARA TAKAAKI
About nondestructive inspection
About piping(system)
About leakage flux
About dimensionless number
About magnetic dipole
About carbon steel
About steel pipe
About Fourier number
About flaw detection test
About Nondestructive testing
About 固体
About 気体
About 輸送
About センサ出力
About 配管
About 傷