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In a wide variety of industrial environments workers may be expected to enter a variety of areas and spaces ...ty and de-sludge the tank while working alone. He entered the tank without breathing apparatus (none was available) and without leaving the tank to ventilate. T

...ools, and, in the case of underground rescues, the operation of [[SCBA]] [[breathing set]]s (to work in passages filled with mine gases such as [[firedamp]], [[ ...htm]), 115 trapped miners were equipped with [[Siebe Gorman Salvus]]es (87 sets in all, mainly from [[fire station]]s) so they could be led out through gas

...e you see on the left side of the photo is a nose-plug to block unintended breathing through one's nose. The green webbing goes around one's head to keep the de [[Category:Industrial breathing sets]]