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Inorganic chemicals
A broad class of substances encompassing all those that do not include carbon and its derivatives as their principal elements, yet not excluding carbides, carbonates, cyanides, cyanates, and carbon disulfide.
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Draco
Astronomy; General astronomy
Et stjernebillede på den langt nordlige himmelkugle. Dets navn er Latin for dragon. Draco er circumpolar (det vil sige aldrig indstilling) for mange observatører på den nordlige ...