Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6373035 | Induction-heating roller device A relay box is fastened to the end of a support rod supporting an induction heating mechanism, which the end is extended outside. Receptacles of connectors are mounted on a surface of the relay box. Lead wires connected to the induction coils are connecte... | 04/16/2002 |
