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DMC Mining Services has been contracted by Sirius Minerals to design and build four shafts at the project, using the Herrenknecht shaft boring roadheader system.
“DMC Mining Services has been contracted to design and build four shafts at the project and intends to use the Herrenknecht shaft boring roadheader system to carry out the work.”mining-journal.com
Summarized from public sources; check the original articles before acting on it.