Thread Rolling Thread Lapping

[Trade catalogs on gear grinders, gear generators, gear testers, thread millers, thread milling machines, threading machines, spline rolling machine, gear hobbing machine ...

https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!493627~!0#focus ...

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