| 11. | The compressed air is stored in an underground reservoir.
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| 12. | They are mainly located in areas that cannot accommodate underground reservoirs due to space restrictions.
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| 13. | A drinking water underground reservoir with pressure valves and related capabilities is beneath the summit.
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| 14. | Underground reservoirs and gas outlets were inundated, causing shortages of clean water and cooking fuel.
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| 15. | The four underground reservoirs have unique fire-fighting arrangements with a capacity of 10, 000 gallons.
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| 16. | The Urquhart shaft had hit an underground reservoir and was never continued to the planned depth.
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| 17. | The Cistern Basilica, an underground reservoir supported by ornate columns from the Byzantine era, was undamaged.
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| 18. | The aquifer is an underground reservoir that provides water for San Antonio and several Central Texas counties.
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| 19. | It is unclear whether a more effective method of replenishing underground reservoirs can be developed by then.
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| 20. | We know where the underground reservoirs are.
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