TY - Journal of Changjiang River Scientific Research Institute A1 - HE Xiao-ming, ZHOU Yong-jie, LIU Run, GAN Fang-ji T1 - Crack Detection of Metal Pipeline by Using Multi-direction Field Signature Method Y1 - 2022-11-01 JF - Journal of Changjiang River Scientific Research Institute JO - Journal of Changjiang River Scientific Research Institute SP - 154 EP - 156 VL - 39 IS - 11 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.202106512022 ER -