Home > 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.
- Kalbos dalis: noun
- Pramonės šaka / sritis: Mining
- Category: General mining; Mineral mining
- Government Agency: USBM
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- ed.young
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