A 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 materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.
The Geological Wing was set up in the Department of Industries, H.P. in the Year 1964 - 65. Primarily, work entrusted to the Geological Wing was to explore the mineral wealth of the State for their scientific and economical exploitation and setting up of mineral based industries.
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