How did they make that. Part 3 /
This video discusses how slate is a valued roofing material for houses due to its durability. It also shows the step-by-step processes used by the British mining industry to mine and prepare the slate boulders for use as roofing material.
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| Format: | Electronic Video |
|---|---|
| Language: | English |
| Published: |
New York, NY :
Big Media,
2010.
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| Subjects: | |
| Online Access: |
Full text (Emmanuel users only) |