ŞTEAMP, şteampuri, s.n. Maşină de lucru folosită în trecut pentru sfărâmarea minereurilor (aurifere). – Din germ. Stampf[mühle].

http://dexonline.ro/search.php?cuv=steamp

Stamp mills were used in early paper making for preparing the paper-stuff (pulp), before the invention of the Hollander beater. They were used in mining for breaking ore, and in oil-seed processing for prior to pressing the oil from the milled seeds. Early mills were water powered but mills can be steam, water, or electric powered.

***Californian stamps*** are stamp mills developed for use in the Californian gold mines. They are based on the Cornish stamps but were more rapid in action, and the heads and lifters were made to rotate so that they wore more evenly. The other advantage of the Californian stamp was that a single head could crush 1.5 tons of ore as opposed to the Cornish stamps which could only crush 1 ton.

http://en.wikipedia.org/wiki/Stamp_mill