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| Number | Title | Issue Date |
| 6060018 | Cold tool steel featuring high size stability, wear-resistance and machinability Cold tool steel having superior machinability, wear-resistance and minimized heat treatment size-change were obtained by specifying components and contents thereof, especially of C, Cr, Si, V and Mo, not by high-temperature soaking. Further, such preharde... | 05/09/2000 |
