slow motion scene in which an employee is checking the quality of the prepared wax mold

metal industry manufacturing casting equipment investment casting production wax investment cast factory foundry workshop technology iron model industrial steel process material mold molding tooling casting process furnace goldsmith lost wax step by step manufacture sandcasting ferrous foundry metallurgy equipment knock mold raw material precious metal steelworks ironworks hot liquid dioxide pressure workplace lostwax casting stainless steel temperature steelmaking closeup metallurgical industry aluminum castings permanent mold