首页 > Term: head coal
head coal
(Scotland) Formerly, the stratum of a coal next to the roof. More usually now, the top portion of a coal seam when left unworked, either permanently or afterwards taken down; the top coal on a loaded wagon.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
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创建者
- ed.young
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(Milwaukee, United States)