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- But the heart and meaning of the structure was a room in its cellar, deep under the ground; the room had been incompetently lined with the porous sheets of soundproofing material; the sheets had begun to crack and the naked rock of a cave showed through.3.9 Part 3 Chapter 9 — The Generator (64% in)
There are no more uses of "porous" in Atlas Shrugged.
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