Lightweight fiberglass feed leg for hand-held pneumatic percussion rock drills

Author:	Spencer, Ellsworth R.
Year:	1985
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:9047
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	9047
Subjects:	Rock-drills
	Boring--Equipment and supplies
Link:	https://hdl.handle.net/2027/mdp.39015078459297