Stamp mill

A stamp mill (or stamp battery) is a type of mill that crushes material by pounding rather than grinding, either for further processing or for extraction of metallic ores. Breaking material down is a type of unit operation.
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Noun
1. a mill in which ore is crushed with stamps
(synonym) stamping mill
(hypernym) factory, mill, manufacturing plant, manufactory
(hyponym) battery, stamp battery

stamp-mill /'stæmpmil/
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Eng: stamp mill
Urdu: کوب مشین ۔ اوکھلی ۔ دھات کُوٹنے والی مشین ۔