CENTENNIAL, AND PARIS MEDALS.
Mason's Friction Clutches and Elevators.
"New and Improved Patterns."
VOLNEY W. MASON & CO., Providence, R. I., U. S. A.
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Scientific American, Volume XLIII., No. 25, December 18, 1880 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. · 第 100 / 165 题