The coils in the scanning apparatus detect these magnetic changes, which are used to build up a map of the part of the body being examined.
扫描仪上的线圈探测到这些磁场变化，并以此构建出患者受检部位的图谱。
The magnetic changes of the samples prepared from ferrous Wiley Mill have been studied with the economic and fast method of Gouy balance.
用经济、快速的古埃天平法，研究了铁质粉碎机制备试样的磁性变化。
The magnetic changes of the samples prepared from ferrous Wiley Mill have been studied with the economic and fast method of Gouy balance.
用经济、快速的古埃天平法，研究了铁质粉碎机制备试样的磁性变化。
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