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COMPLETE PRINTED PATENT APPLICATION NUMBER 12,947 FOR IMPROVEMENTS IN APPARATUS FOR THE TREATMENT OF LIQUIDS BY MENS OF ULTRA-VIOLET RAYS. [1910]
COMPLETE PRINTED PATENT APPLICATION NUMBER 12,947 FOR IMPROVEMENTS IN APPARATUS FOR THE TREATMENT OF LIQUIDS BY MENS OF ULTRA-VIOLET RAYS... by Professor Victor, Doctor Andre Helbronner & Max von Recklinghausen (inventors). Henri (Hardcover - 1910)
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