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Scientific American, Vol. 61, No. 17 (1889) (1889)
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product of remarkable made of a continuous sheet of the best homogeneous purity and keeping qualities obtained. This system steel, 35 in. wide, brought into circular form, when the was invented and perfected by Mr. Casper Pfaudler, the ends are welded together by a special process, making a… … © 1889 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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