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gateway longwall
N. of Eng. A continuous coal face served by gateways (in Durham about 12 yd or 11 m apart). A small group works in each gateway down which the coal is removed by tubs.
- 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)