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Crawler Mobile Crusher

Crawler type mobile crushing and screening plant is researched and designed by our experienced engineers. It is of stable performance and beautiful structure. It is widely used in road &bridge construction, building, mining and other fields.…

Mobile Primary Jaw Crusher

The mobile primary jaw crushers are characterised by their uncompromising design and sturdiness. The outstanding overall performance of the machines results from the harmonious …

C6X Series Jaw Crusher

C6X Jaw Crusher is new equipment used for crushing hard or abrasiveness stones. It is possess of detachable frame without welding structure, double wedge adjusting device, elastic limit damping device and integrated motor seat, which will make C6X Series Jaw Crusher popular in the market.
According to well-knit processing…

European Type Jaw Crusher

European Type Jaw Crusher adopts world-class technology and high-end raw materials, which can crush hard stones or ores. Based on advantages of excellent quality…

VSI6X Series Vertical Shaft Impact Crusher

VSI6X Series Vertical Shaft Impact Crusher is a newly-developed and highly-efficient stone-crushing and sand-making machine with many national patent technologies. This machine adopts years of research and development experience and technical philosophy.…

VSI5X Vertical Shaft Impact Crusher

VSI5X vertical shaft impact crusher is very popular on the market. The machine meets customer requirements for efficiency and capacity with a 48% increase in service life, a 30% reduction in cost and a 30% increase in material throughput.…

Grinding stone references

  • Stone Age - Africa | Britannica

    Stone Age - Africa: The Paleolithic of Africa is characterized by a variety of stone-tool assemblages, some of which represent purely local developments while others are practically identical with materials from corresponding horizons in Europe. Geological investigations of the Late Cenozoic deposits of this continent indicate that, as the result of fluctuations in rainfall, the Pleistocene ...

  • Grinding machine - Wikipedia

    2018-11-29 · A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding, which is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation. Grinding is used to finish workpieces that must ...

  • Metate - Wikipedia

    2018-11-25 · A metate or metlatl (or mealing stone) is a type or variety of quern, a ground stone tool used for processing grain and seeds. In traditional Mesoamerican culture, metates were typically used by women who would grind lime-treated maize and other organic materials during food preparation (e.g., making tortillas). Similar artifacts are found all ...

  • Abrasive | material | Britannica

    Abrasive: Abrasive, sharp, hard material used to wear away the surface of softer, less resistant materials. Included within the term are both natural and synthetic substances, ranging from the relatively soft particles used in household cleansers and jeweler’s polish to the hardest known material, the

  • Stone Age - Africa | Britannica

    Stone Age - Africa: The Paleolithic of Africa is characterized by a variety of stone-tool assemblages, some of which represent purely local developments while others are practically identical with materials from corresponding horizons in Europe. Geological investigations of the Late Cenozoic deposits of this continent indicate that, as the result of fluctuations in rainfall, the Pleistocene ...

  • Grinding machine - Wikipedia

    2018-11-29 · A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding, which is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel's surface cuts a small chip from the workpiece via shear deformation. Grinding is used to finish workpieces that must ...

  • Metate - Wikipedia

    2018-11-25 · A metate or metlatl (or mealing stone) is a type or variety of quern, a ground stone tool used for processing grain and seeds. In traditional Mesoamerican culture, metates were typically used by women who would grind lime-treated maize and other organic materials during food preparation (e.g., making tortillas). Similar artifacts are found all ...

  • Abrasive | material | Britannica

    Abrasive: Abrasive, sharp, hard material used to wear away the surface of softer, less resistant materials. Included within the term are both natural and synthetic substances, ranging from the relatively soft particles used in household cleansers and jeweler’s polish to the hardest known material, the

  • Stone Age - Africa | Britannica

    Stone Age - Africa: The Paleolithic of Africa is characterized by a variety of stone-tool assemblages, some of which represent purely local developments while others are practically identical with materials from corresponding horizons in Europe. Geological investigations of the Late Cenozoic deposits of this continent indicate that, as the result of fluctuations in rainfall, the Pleistocene ...

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