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a. A given quantity of ore tested for its quality by actual milling; the
yield of such a test. Craigie
b. Average, not esp. selected. Craigie
c. In intermittent treatment of ore, with periodic cleanup, the period of
such a run. Bulk test on a sample of ore during development of a treatment
process. Pryor, 3
Source:
Dictionary of Mining, Mineral, and Related Terms
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