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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 it? Set 468
2720: ceramic insulator of a now-damaged sparkplug
2721: no idea 2722: an early radio (sparkgap transmitter? crystal receiver?) 2723: some kind of hole cutter; start with a pilot hole, this scores a large-radius circle with two hardened cutterwheels 2724: there's a piston missing, I'm thinking this is a rivet press, like for staking the rivets in Levi's jeans. Or, rhinestones, or snaps. |
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