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Sulfur Hexafluoride is a colorless, oderless fuel with a density five situations that of the air we breathe – mint

Sulfur Hexafluoride is a colorless, oderless gas with a density five times that of the air we breathe

Sulfur Hexafluoride is a colorless, oderless gasoline with a density five times that of the air we breathe – brand-new