6BRILL T M, CALVEZ J L, DEMICHEL C, et al. Electromagnetic casing inspection tool for corrosion evaluation[C].The International Petroleum Technology Conference, Bangkok, Thailand, February 7-9,2012.
7KANDROODI M R, ARAABI B N, AHMADABADI M N, et al. Detection of natural gas pipeline defects using magnetic flux leakage ts[C]. The 2013 IEEE International ConferenceonMultimediaandExpo,San Jose, Califomia, USA, July 15-19,2013.
