Production:1830027a

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Revision as of 16:03, February 13, 2020 by Cheri (talk | contribs) (Created page with "{| class="wikitable" ! year !! DMM !! operator !! production !! cumulative !! opening !! depth !! seam !! thickness !! method !! days !! emp |- | 1879 || || G. Gowers || 1,00...")
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year DMM operator production cumulative opening depth seam thickness method days emp
1879 G. Gowers 1,000 shaft 90 5.5 7 mo
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