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  • curprev 21:4821:48, 26 February 2017Moribund talk contribs 376 bytes +376 Cal-Earth polypropylene tubes being used to construct domed structures. Attribution: By DVIDSHUB [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons Image from Wikimedia commons https://commons.wikimedia.org/wiki/File:Flick...
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