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V method styling is a emerging of styling process, is used single worked sand (not plus water, and bond agent and the additional real) made type sand, with plastic film by heating Hou in with ventilation hole and axis gas device of looks Shang peritoneal forming, sealed sand box, and relies on vacuum pump taking type within air, caused cast both inside and outside pressure errand dry sand get compact, by trip by needed of type cavity of a physical styling method.