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1. This magnetic inspection paste is used to detect the presence of iron in the sample.
这种磁性检测胶用于检测样品中是否有铁。
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2. The technician carefully applied the magnetic inspection paste to the surface of thesample.
技术人员小心翼翼地将磁性检测胶涂抹在样品表面。
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3. The magnetic inspection paste was then heated and left to dry for a few minutes before being analyzed.
然后加热并让磁性检测胶干燥几分钟，然后再进行分析。