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Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 114
■<— -2 6-^- 28 > - 3-7"- -3-2- -5 3-2 > -14-11- New Work, Section on Center Line of Shaft.Engineering
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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