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fire-heavy
Eng. Words marked upon the scale of a mercurial barometer to indicate when considerable combustible gases may be expected to be given off in the mine, and to show that extra vigilance is required to keep the ventilation up to its full strength.
- 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)