| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a rolling device, capable of reducing costs and man-hours. <P>SOLUTION: When inspecting the presence of an oxide-based inclusion with an average length more than 200μm in an object 17 to be measured, such as a bearing ring, the presence of the oxide-based inclusion with the average length more than 200μm is inspected by using an electromagnetic induction sensor 12 that comprises an excitation coil and an induction coil. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
