Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills
By: by Ellsworth R. Spencer.
Series: Information circular / United States Department of the Interior, Bureau of Mines ;; 9047; Information circular (United States. Bureau of Mines) ;; 9047.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1985
Place of publication: Pittsburgh, Pa. (P.O. Box 18070, Pittsburgh 15236)
Language: eng
Subjects: Rock-drills.; Boring -- Equipment and supplies.