HAULAGE SAFETY IN LOW-COAL MINES
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✎ Suggest a correctionDramatically pictures how accidents can be prevented or can happen in the underground transportation of men, coal, and supplies through tunnels in 'low' coal.
Sources
- usgov-av-1974 — title, year, creator, length, color, sound, description
Record added 2026-07-02 18:25:30 · Suggest a correction