Roof Bolting In Coal Mines
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✎ Suggest a correctionExplains the principles and purposes of roof bolting in coal mining. Coordinates mining operations and bolting methods, and stresses safety throughout the roof control process.
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- A-V Online (National Information Center for Educational Media). CD-ROM database of educational and documentary media, compiled and maintained by the National Information Center for Educational Media (NICEM). — title, creator, length, format, description
- 16mm Filmography (legacy record) — sound, catalog record
- usgov-av-1974 — title, year, creator, length, color, sound, description
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