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HARD SEATS FOR VALVES

5th July 1957, Page 76
5th July 1957
Page 76
Page 76, 5th July 1957 — HARD SEATS FOR VALVES
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A METHOD of forging valve blanks rA _So as to give them a zone of hard metal in the sealing area, forms the subject of patent No. 773,695. The patentee is Alfred Teves Maschinenund-Armaturenfabrik K.G., Frankfurt am Main, Germany.