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Diesel engines underground.

Diesel engines underground.

Aerial tramways in the metal-mining industry :construction and operating costs

Diesel engines underground.

Diesel engines underground.

Possible hazards attending the use of engines operated on butane fuel in mining and tunneling

Permissible mine equipment approved during 1944

Use of scrapers and other light earth-moving equipment in bituminous-coal strip mining

Diesel equipment in underground mining

Permissible mine equipment approved to January 1, 1947 :with appended list of available flame-lamp fuels

Permissible mine equipment approved during the calendar year 1947 :supplement to Information Circular 7432

Diesel engines underground.

Performance of a diesel mine locomotive


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