Mechanical safeguards in rotary drilling

Author:	Miller, Harold Carl,
Year:	1925
Document Type:	USBM
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines :
SUDOC:	C 22.5:369
Series:	Technical paper / United States Department of Commerce, Bureau of Mines ;
Report Number:	369
Subjects:	Drilling and boring
	Oil well drilling
	Machinery--Safety appliances
Link:	https://hdl.handle.net/2027/mdp.39015078542761