UNDERGROUND ROOM ARRANGEMENT
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United States of America Patent
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Issued Date -
Mar 21, 2024
app pub date -
Feb 2, 2022
filing date -
Feb 4, 2021
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Abstract
An underground room arrangement, comprising a structure surrounding a room, the structure comprising a plastic tube and plastic end walls, wherein the plastic end walls are arranged to close the plastic tube so that inner surfaces of the plastic tube and the plastic end walls are towards the room.
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