Aluminum casting. Before metal can be poured into the mold, this wooden superstructure will be completely filled with sand. Technically, it's known as facing sand on coperflask and placing of gaggers. But in anybody's language, it's one of the many operations necessary to complete molds in which vital aluminum parts for the armed forces will be cast. What the exact object being cast is, is one of the army's secrets. Aluminum Industries Inc., Cincinnati, Ohio