The shrinkage allowance for cast iron pattern is________________?
A. 15 mm/m
B. 20 mm/m
C. 26 mm/m
D. 10 mm/m
The shrinkage allowance for cast iron pattern is________________?
A. 15 mm/m
B. 20 mm/m
C. 26 mm/m
D. 10 mm/m