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Subjects
Analysis, Coal mines and mining, Methane, Mine ventilation, Safety measuresEdition | Availability |
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Methane analyzer system to record continuously the methane content of coal mine ventilation air
1975, U.S. Bureau of Mines
in English
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December 4, 2010 | Edited by Open Library Bot | Added subjects from MARC records. |
December 10, 2009 | Created by WorkBot | add works page |