§ 75.201 - Definitions.

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§ 75.201 Definitions.

Automated temporary roof support (ATRS) system. A device to provide temporary roof support from a location where the equipment operator is protected from roof falls.

Pillar recovery. Any reduction in pillar size during retreat mining.

                    
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§ 75.201 - Definitions.

§ 75.201 Definitions.