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Effect of ultralow frequency signaling on blasting array current /
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Соавтор: | |
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Другие авторы: | |
Формат: | |
Язык: | английский |
Опубликовано: |
Avondale, Md. :
U.S. Dept. of the Interior, Bureau of Mines,
1993.
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Серии: | Report of investigations ;
9479 Report of investigations (United States. Bureau of Mines) ; 9479 |
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110 | 2 | 0 | |a United States. |b Bureau of Mines. |
245 | 1 | 0 | |a Effect of ultralow frequency signaling on blasting array current / |c by Kenneth E. Hjelmstad and Russell E. Griffin. |
260 | 0 | |a Avondale, Md. : |b U.S. Dept. of the Interior, Bureau of Mines, |c 1993. | |
300 | |a 7 p. | ||
440 | 1 | |a Report of investigations ; |v 9479 | |
650 | 0 | |a Mines and mineral resources. | |
650 | 0 | |a Electric detonators |x Safety measures. | |
650 | 0 | |a Electromagnetic waves |x Transmission. | |
650 | 0 | |a Fire alarms. | |
700 | 1 | 0 | |a Hjelmstad, Kenneth E. |
830 | 0 | |a Report of investigations (United States. Bureau of Mines) ; |v 9479 | |
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