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Ultra low frequency electromagnetic fire alarm system for underground mines
Effect of ultralow frequency signaling on blasting array current
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Published Year
1990-1999 (2) *
Subject
Fire alarms (2) *
ELF electromagnetic fields (1)
Electric detonators--Safety measures (1)
Electromagnetic waves--Transmission (1)
Mine fires--Prevention and control (1)
Author
Hjelmstad, Kenneth E. (2)
Griffin, Russell E. (1)
Pomroy, William H. (1)
