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Crusher - WikipediaA crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. Crushers may be used to reduce the size, or change the form, of waste .. Jaw crushers are heavy duty machines and hence need to be robustly constructed. . A cone crusher is suitable for crushing a variety of mid-hard and above.cement roller mill crusher mills cone crusher jaw crushers,Laboratory Crushers, Pulverizers, Grinders | Laval LabCrusher, pulveriser, grinder or mill for the laboratory to pilot plant sample processing. . chemistry, pharmaceutical, cement, material engineering, environment, . Jaw Crushers, Roll Crushers, Cone Crushers, Disk Mills and Mortar Grinders.