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Vortex rings generated by eruptions of Etna volcano Vortex rings from Stromboli volcano Instructions on building a smoke ring cannon Smoke rings at US Army disposals in Iraq (see images on bottom) Thomson, Sir William (Lord Kelvin), On Vortex Atoms , Proceedings of the Royal Society of Edinburgh, Vol
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Fire sprinkler systems are actually quite sophisticated, and are designed to be heat sensitive so that sprinklers only activate when the temperatures rise to fire-induced temps, usually somewhere between 155 to 165 degrees Fahrenheit
tous les tablissements destins laccueil, la formation, lhbergement ou les activits sportives des mineurs
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