#21
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Best regards Bernt |
#22
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I surmise two areas of greatly contrasting hardness/stiffness. Worked area with pronounced added geometry acts as reinforced barrier of resistance vs the unworked annealed "flat," offering the measured contrast and providing the needed "window of opportunity" for each successive ring to be added to the stack. Elegant.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#23
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Karl Heinz |
#24
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Interesting.
Thank you. I do not think these are totally obsolete though.
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Best regards Bernt |
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