Related Clues:
- They're located in cockpit as source of power
- Crews installing current for power supply
- Electricity supply
- Distribution network seen in cockpit
- Water, gas or electricity supply
- People mending pipes?
- Leader in Sun supporting principal source of power in the House
- Major conduits
- Those in the rag trade are carrying a lot of material that goes to waste
- Small containers which eliminate waste
- Underground waste conduits
- Waste pipes
- One island cutting another's power supply
- Major pipes
- Reservoir conduits