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Title: 1 box of thread points and grooves for an internal machine u [Go to resource]
Description: 1 box of thread points and grooves for an internal machine used with the internal thread measuring machine, 1921 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Source: Science Museum Identifier: 1981-771/3 Go to resource More Like this...
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