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Books by Reginald Arthur. (Vickers-Armstrongs Aircraft Ltd). Firman

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ORIGINAL PATENT APPLICATION NUMBER 839,195 FOR IMPROVEMENTS RELATING TO THE HARDENING OF METALLIC OBJECTS BY AN ELECTRICAL INDUCTION-HEATING PROCESS. (WESTMINSTER, LONDON).
ORIGINAL PATENT APPLICATION NUMBER 839,195 FOR IMPROVEMENTS…
By: Reginald Arthur. (Vickers-Armstrongs Aircraft Ltd). Firman
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