Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B22
CASTING; POWDER METALLURGY
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B22D
CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
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27/00
Treating the metal in the mould while it is molten or ductile; ;; Pressure or vacuum casting
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B22D27/13
making use of gas pressure
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