CPC Subgroup
B22C 9/046 Full Title
Moulds or cores (uniquely adapted to particular casting processes B22D); Moulding processes > Sand moulds or like moulds for shaped castings > Use of lost patterns
B22C 9/046 Moulds or cores (uniquely adapted to particular casting processes B22D); Moulding processes > Sand moulds or like moulds for shaped castings > Use of lost patterns