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US patent 9370765,Peter Haaland,「Space-filling polyhedral sorbents」,發表於2016-06-21,發行於2016-06-21,指定於Innerproduct Partners Fund Lp, US 2016/0096164 A1(PDF). [2019-09-09]. Suitable regular shaped space-filling polyhedra includ, but are not limited to, an acute golden rhombohedron, ...... an Escher's solid, ......and a truncated octahedron.
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