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Stoping is the process of extracting the desired ore or other mineral from an underground mine, leaving behind an open space known as a stope. Stoping...11 KB (1,521 words) - 08:51, 14 May 2023- Roger Kaufman (1932 - September 23, 2020) was an American figure in the history of educational technology and performance improvement, as well as in strategic...14 KB (1,564 words) - 12:43, 19 July 2024