Filters used in the manufacture of molten metals; ceramic foam filters used in the manufacture of molten metals; molten metal filter chambers and treatment units; machines used in the filtration of molten metals; vacuum pumps; vacuum priming machines; vacuum priming systems comprised of vacuum prime pumps and valves, hoses, and controls used in connection therewith; vacuum pump equipment comprised of vacuum pumping machines and valves, hoses, and controls used in connection therewith

Copolymer (EPS/PMMA) beads that are used to create the foam mold, in lost foam casting applications

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