Energetics of percussive drills

Author:	Bruce, William E.
Additional Authors:	Paone, James.
Year:	1969
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:7253
Series:	Report of investigations / Bureau of Mines ;
Report Number:	7253
Subjects:	Drilling and boring machinery
	Rock-drills
Link:	https://hdl.handle.net/2027/mdp.39015078538363