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Scientific American, Vol. 34, No. 13 (1876) (1876)
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is may be done without stopping can likewise be turned. the revolution of the spindle, as would have to be done in We know of no direct practical confirmation of this, but the case of an ordinary cotter, or a set screw fixing. This should be glad to hear from any of our readers who may the drill is… … © 1876 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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