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"underground workings" » "underground works", "underground openings", "underground wireless"
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1
by Skrzypkowski, Krzysztof
Published 2022
MDPI - Multidisciplinary Digital Publishing Institute
Subjects: “...underground mining...”
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2
by Ullah, Fahim
Published 2023
MDPI - Multidisciplinary Digital Publishing Institute
Subjects: “...underground works...”