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2 Subjects: “...underground mine...”

3 Subjects: “...underground mining...”

4 Subjects: “...underground mining...”

5 Subjects: “...underground mining robots...”

6 Table of Contents: “...1 Importance and Characteristics of Underground Mine Gas Explosions -- 2 A Historical Review...”

7 Table of Contents: “... Mining -- Optimisation in UndergroundMining -- Long- and Short-Term Production Scheduling at Lkab...”