Permissible mine equipment approved during the calendar years 1947-49
By: by H.B. Brunot.
Contributors: United States. Bureau of Mines.
Series: Information circular (United States. Bureau of Mines) -- 7569
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1950
Place of publication: Washington, DC
Language: eng
Number of pages: 16
Subjects: Coal-mining machinery -- Standards -- United States.; Mining machinery -- Standards -- United States.
Notes: bibliogr.

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