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- Permissible mine equipment approved during the calendar years 1947-49
- Permissible mine equipment approved during the calendar year 1950
- Inspection and testing of mine-type electrical equipment for permissibility :revision of Information circular 7185
- Permissible Mine Equipment Approved to January 1, 1953: With Appended List of Available Flame-Lamp Fuels and Manufacturers of Flame-Resistant Trailing Cables
- Permissible mine equipment approved during the calendar years 1953-54
- Permissible mining-loading equipment