Field test of an automated temporary roof support (ATRS) on a low-coal, single fixed-head roof-bolting machine (squirmer)
By: by Charles T. Chislaghi and Thomas E. Marshall.
Contributors: Marshall, Thomas E.; United States. Bureau of Mines.
Series: Bureau of Mines technical progress report -- 119.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1982
Place of publication: Pgh [i.e. Pittsburgh], PA
Language: eng
Format: Microform
Number of pages: 11
Subjects: Mine roof bolting.; Coal-mining machinery.
Notes: "Bureau of Mines Coal Mine Health and Safety Program."

"December 1982."

Includes bibliographical references.

Microfiche. [Washington] : SUPTDOCS/GPO, 1982. 1 microfiche : negative.