Industrial Geography of the United States regarding mining of Anthracite Coal. Coal miners enter open sided elevator. Cross section diagram of earth about coal vein and its different levels. Diagram about the work level. Workers go into the rooms with light-caps. Air circulation maintenance and water drainage system. Water comes out of mammoth pumps. Hazards of coal mining.
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Type | Size | Price (USD) Comprehensive All Media License |
Price (USD) Digital-Only License |
---|---|---|---|
HD Master, Broadcast-ready (1920x1080, unmarked) | 1591 MB | $195.00 | $79.00 |
HD Screener (1920x1080, full-res with timecode) | 1591 MB | FREE or $4 (see below) | FREE or $4 (see below) |
Proxy (320x240, low-resolution, watermarked) | 26 MB | FREE or $4 (see below) | FREE or $4 (see below) |