CPC Subgroup
B22C 9/30 for chains
Full Title
Moulds or cores (uniquely adapted to particular casting processes B22D); Moulding processes > Moulds for peculiarly-shaped castings > for chains
B22C 9/30 Moulds or cores (uniquely adapted to particular casting processes B22D); Moulding processes > Moulds for peculiarly-shaped castings > for chains