क्या किसी भी खान में कोई भी गर्म गैस मिलने से उसे 'गैसी की खान' कहा जाता है ? || Gas testing video in hindi by indianminerology || indian minerology

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gas testing video #07

 क्या किसी भी खान में कोई भी गर्म गैस मिलने से उसे 'गैसी की खान' कहा जाता है ? || Gas testing video in hindi by indianminerology || indian minerology    

               

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