RUFFNER & DUNN, PATENTEES
and Sole Manufacturers of the Excelsior Steel Tube Cleaners. Price
$1.00 per inch. Send for circular.
Scientific American, Volume 40, No. 13, March 29, 1879 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures · 第 153 / 162 题