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Testing of coal-cutter materials for incendivity and radiance of sparks
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Published Year
1970-1979 (1)
Subject
Mine gases (1) *
Mine tools (1)
Author
Blickensderfer, Robert. (1)
Copeland, M. I. (1)
Deardorff, D. K. (1)
Kelley, J. E. (1) *
