Support #168 GasGuard Ventilation Diagram

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Optrix Longwall Mine / Underground / Longwall #1 / Roof Support / Roof Support #168 / Support #168 GasGuard

DCBCMESupport #35GasGuardSupport #70GasGuardSupport #105GasGuardSupport #135GasGuardSupport #168GasGuardTailgateMG12 A5-6downstream fromis upstream from