Frictional ignition of natural gas-air mixtures by alternative coal-cutter bit shank materials

Author:	McDonald, L. Garner.
Year:	1992
Document Type:	BMRA
Issuing Agency:	Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:9417
Series:	Report of investigations / Bureau of Mines ;
Report Number:	9417
Subjects:	Friction
	Coal-cutting bits--Testing
	Mine explosions--Prevention
	Coalbed methane--Combustion
Links:	https://hdl.handle.net/2027/mdp.39015077558636
	no.9417 1992