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28th July 1931, Page 64
28th July 1931
Page 64
Page 64, 28th July 1931
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A Water-cooled Sparking Plug

A Résumé of Recently Published Patent Specifications T HE sparking plug described in patent No. 351,340, by Adolphe Kegresse, 156, Rue Armand Silvestre, Courbevoie, France,......