首页 > Term: instrumentalities of mining
instrumentalities of mining
The true meaning of such expressions as shafts, tunnels, levels, uprises, crosscuts, inclines, and sump when applied to mines signifies instrumentalities whereby and through which such mines are opened, developed, prospected, and worked.
- 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)