Slope mining is a method of accessing valuable geological material, such as coal. A sloping access shaft travels downwards towards the coal seam. Slope mines differ from shaft and drift mines, which access resources by tunneling straight down or horizontally, respectively.
From http://en.wikipedia.org/
Ear Force X41 (XBOX LIVE Chat + Wireless Digital RF Game Audio with Dolby
Headphone 7.1 Surround Sound)
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Ear Force X41 (XBOX LIVE Chat + Wireless Digital RF Game Audio with Dolby
Headphone 7.1 Surround Sound)
by Turtle Beach
[image: Ear Force X41 (XBOX LIVE C...
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