ホーム > Term: not previously known to exist
not previously known to exist
These words refer to the time of the location and commencement of the tunnel and not to the respective times of the discoveries of the various veins in the tunnel.
- スピーチの一部 noun
- 産業/ドメイン 炭鉱
- カテゴリ 炭鉱全般; Mineral mining
- Government Agency: USBM
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作成者
- ed.young
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(V.I.P) 21084 ポイント - 100% positive feedback
(Milwaukee, United States)
