NOVEL CLOTHES LINE PULLEY. 'S CLOTHES LINE PULLEY. NEW FOLDING BOAT. VISIT TO THE TESTING STATION OF THE INDUSTRIAL ACADEMY BERLIN. ENGINEERING INVENTIONS., scientific american, 1880-08-14
NOVEL CLOTHES LINE PULLEY. 'S CLOTHES LINE PULLEY. NEW FOLDING BOAT. VISIT TO THE TESTING STATION OF THE INDUSTRIAL ACADEMY BERLIN. ENGINEERING INVENTIONS., scientific american, 1880-08-14
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