A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. . The earliest of these were in the foundries, but as coal took hold the larger operations ... in 1960 may be able to produce 170 tons/h of crushed rock, whereas the same size crusher manufactured today may produce 300 …
حقوق النشر © 2024.CDM كل الحقوق محفوظة.خريطة الموقع