Related Clues:
- Discharge pipes; shops
- Tear passageways
- Air channels seen in a tense 'Alien' scene
- Smoke conduits
- Body tubes
- Allows to go free the wrong way round shops
- Heat carriers
- Powerpoints?
- Air conduits
- Place for retailing goods
- Drunk stout taking in the foreign markets
- Chimney passages
- Air conditioning channels
- Vents in shops?
- Tear sources