本文的重点在于系统的磁路设计，采用信号相关性运算比较被测钢管信号和模板信号缩小端头盲区的“无盲区”方法。
The main parts of the article are the designation of magnetic path for the detecting system and the "no blind areas" method, which is based on the signal relativity operation.
本文的重点在于系统的磁路设计，采用信号相关性运算比较被测钢管信号和模板信号缩小端头盲区的“无盲区”方法。
The main parts of the article are the designation of magnetic path for the detecting system and the "no blind areas" method, which is based on the signal relativity operation.
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