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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Drill sharpening.
Why are aircraft drills sometimes sharpened with a step at the end? is
it for drilling sheet in two stages? |
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