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O3 Mining Provides Progress Update on Pre-Feasibility Study for Marban Engineering

TSXV: OIII | OTCQX: OIIIF - O3 Mining TORONTO, June 7, 2022 /PRNewswire/ - O3 Mining Inc. (TSXV:OIII) (OTCQX:OIIIF) ("O3 Mining" or the "Corporation) is pleased to provide a progress update on the mining, metallurgical, geomechanical, geotechnical, e