Methane analyzer system to record continuously the methane content of coal mine ventilation air /

I tiakina i:
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Kaituhi matua: Irani, M. C. (Meherwan C.)
Kaituhi rangatōpū: United States. Bureau of Mines
Ētahi atu kaituhi: Jeran, P. W. (Paul W.), Lawhead, D. H. (David H.)
Hōputu: Tē mōhiotia
Reo:Ingarihi
I whakaputaina: Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1975.
Rangatū:Report of investigations (United States. Bureau of Mines) ; 8009
Ngā marau:
Methane > Analysis.
Coal mines and mining > Safety measures.
Mine ventilation.
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