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Production:91830494

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Revision as of 14:30, September 17, 2024 by Cheri (talk | contribs) (Cheri moved page Production:1830494 to Production:91830494)
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year DMM company production cumulative type depth seam thickness method days emp
1930 F. H. McConnell et al. 2,170 ug 271 6
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