In a size reduction crushing operation, the feed size is 10 to 50 mm,
while the product size is 2 to 10 mm. This is a case of __________ crushing.
(A) Primary
(B) Secondary
(C) Fine
while the product size is 2 to 10 mm. This is a case of __________ crushing.
(A) Primary
(B) Secondary
(C) Fine