APPARATUS FOR MAINTAINING A SPECIAL ATMOSPHERE ABOVE A CASTING MOLD
United States Patent 3545529
Inventors:
Keene, Robert J.
Publication Date:
12/08/1970
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Assignee:
UNITED STATES STEEL CORP
Primary Class:
Other Classes:
249/204, 164/475, 249/121
International Classes:
B22D11/041; B22D27/00