| 摘要 |
FIELD: respiratory equipment adapted to be used in closed space, namely in cisterns, wells and so on in the case of low oxygen content in ambient air or in the case of unknown ambient gas composition. ^ SUBSTANCE: hose gas mask comprises facial part, supply air channel including reinforced hose and corrugated pipes, drum, equipment made as belt with straps and alarm-and-rescue rope. Drum receives electric fan with manual drive reducer. Inserted inside drum are partitions, which define sealed cavity with fan installed inside it and is provided with connection socket. ^ EFFECT: extended range of functional capabilities. ^ 2 cl, 3 dwg |
