- - Drainage areas
- - Liquid-drainage pits
- - Drainage pits
- - Drainage sites
- - Mine drainage pits.
- - Oil reservoirs
- - Whole public service creates reservoirs
- - Oil reservoirs in car engines
- - Water collection pits
- - Water collectors
- - Basement pumps
- - Collection areas
- - Drains for rains
- - Water pump types
- - Cesspools
- - Liquid-draining pits
- - Water pits
- - Places for pumps
- - Some cisterns
- - Some reservoirs
- - Water pumps
- - Water collection areas
- - Pits in mine shafts.
- - Mining pits.
- - Mine pits.
- - Oil traps of engines.
- - Cisterns
- - Inner casings holding oil in engines
- - lubricant reservoirs
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