advanced solar sail conceptᆞ HELIOS advanced solar sail concept: http://youtu.be/4F97NdwvmUM ᆞ특허등ᆞfoldable expandable flexible etc statite etcᆞsws swws etcᆞFTAᆞᆞ20150302ᆞ

advanced solar sail conceptᆞ  HELIOS advanced solar sail concept:  http://youtu.be/4F97NdwvmUM  ᆞ특허등ᆞfoldable expandable flexible etc statite etcᆞsws swws etcᆞFTAᆞᆞ20150302ᆞ

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