B
PERFORMING OPERATIONS; TRANSPORTING
B
PERFORMING OPERATIONS; TRANSPORTING
B22
CASTING; POWDER METALLURGY
B22
CASTING; POWDER METALLURGY
B22C
FOUNDRY MOULDING
B22C
FOUNDRY MOULDING
B22C1/00
Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
B22C1/00
Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds