File:7.png

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Revision as of 20:19, 5 February 2015 by RTkachenko (talk | contribs) (Longitudinal view of a bottom-up extraction sequence, retreating to a central crosscut; pillars are optional.)

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7.png ‎(509 × 240 pixels, file size: 36 KB, MIME type: image/png)

Longitudinal view of a bottom-up extraction sequence, retreating to a central crosscut; pillars are optional.

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current20:19, 5 February 2015Thumbnail for version as of 20:19, 5 February 2015509 × 240 (36 KB)RTkachenko (talk | contribs)Longitudinal view of a bottom-up extraction sequence, retreating to a central crosscut; pillars are optional.
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Horizontal resolution 37.79 dpc
Vertical resolution 37.79 dpc
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