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There’s levels to this pit - Going deeper and deeper with Michael Holtkamp

Under the roof of the Gray Coe there are countless microphones, with each microphone being suspended from the ceiling just like a clothes hook. At the beginning of a shift, each miner lowers his microphone, like the announcer in a boxing ring did in the past. When the bell rings three times, the crew goes down into the mine. Glückauf!

The log
This is where I document the advances at Graukaue 2.

The butty system
This is how you facilitate advances.