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Cable_installation_21
Highbury_Substation_model_13
High_viltage_cable_core
Channel_Gate_Road_site
Headhouse_construction_2
Cables_in_troughs_at_ground_level
Cables_installation_from_tunnel_into_shaft1
Cables_at_base_of_shaft1
Budowa tunelu Shieldhall w Glasgow. Fot. BBC
Mining_team2
Podziemna sieć energetyczna – tunele w Londynie. Fot London Power Tunnels
national_grid_workers
RJW.031216.0280

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