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Scientific American, Vol. 55, No. 9 (1886) (1886)
leaf 10
f the shell, the drilling saddles are elevated together by independent power driving gear, a pitching staff and pointer being provided for determining the position of the holes in this seam. Kendall & Gent are the makers, Springfield Works, Manchester.— Engineering. SS Tanning in China. Consul… … IMPROVED BOILER DRILLING MACHINE. © 1886 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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