%_What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?_%

%_What is the usual value of angle of nip for crushing of ordinary roc

1.	%_What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?_%
A.	16¬¨‚àû
B.	32¬¨‚àû
C.	40¬¨‚àû
D.	46¬¨‚àû
Answer» C. 40¬¨‚àû