Tardis

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Tardis
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Tardis

A Hardinger seal was a type of lock that hermetically sealed an area, rendering it impenetrable by either water or air. The central dome of Bowie Base One used Hardinger seals, which prevented crewmembers infected by the Flood from getting into it. (The Waters of Mars [+]Russell T Davies and Phil Ford, Doctor Who Autumn Special 2009 (BBC One, 2009).)

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