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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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What is the hardest substance?
In a casual conversation today the question came up, "Is there anything
harder than a diamond?" Is there? I am off to do a google but I will welcome any knowledge that anyone might want to add. |
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