ORIGINAL PATENT APPLICATION NUMBER 839,195 FOR IMPROVEMENTS RELATING TO THE HARDENING OF METALLIC OBJECTS BY AN ELECTRICAL INDUCTION-HEATING PROCESS. (WESTMINSTER, LONDON). Buy on Amazon

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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).

Book Details

PublisherHMSO
ISBN / ASINB003X36XZM
ISBN-13978B003X36XZ8
Sales Rank99,999,999
MarketplaceUnited States  🇺🇸
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