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Search terms | resistance of dug coal mining coal, types of rocks uses and reason for their use, write the type of coal, refuge chamber, coal mine blower, any four rocks and theeir uses, mining terms, "to research the forming style of mining structure", vehicles used in mine extractions, mining equipments and their uses |
Additional terms | сщфдувгсфешщтющкп, цццюсщфдувгсфешщтющкп, сщфдувгсфешщт, coqleducqtion:org, zzz:coqleducqtion:org, coqleducqtion, בםשךקגובשאןםמץםרע, '''ץבםשךקגובשאןםמץםרע, בםשךקגובשאןםמ, ؤخشمثيعؤشفهخىزخقل, صصصزؤخشمثيعؤشفهخىزخقل, ؤخشمثيعؤشفهخى |