单词 | heap sampling |
释义 | heap sampling [`hēp ´sam·pliŋ] MINING ENGINEERING Method of ore sampling in which the material is shoveled into a conical heap which is then flattened with a spade and shoveled into four equal heaps, two of which are retained, crushed, mixed, and formed into another, smaller cone; the process is repeated until the required small sample is produced. |
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