Methane gas explosion is the main cause of accidents in the coal industry
https://sputniknews.com/20130211/Methane-in-coalmines-179410057.html
Methane in coalmines
Methane in coalmines
Methane gas explosion is the main cause of accidents in the coal industry 11.02.2013, Sputnik International
2013-02-11T15:27+0000
2013-02-11T15:27+0000
2013-02-11T15:27+0000
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Methane in coalmines
Methane gas explosion is the main cause of accidents in the coal industry
