... Unique brake gear,Used in narrow space 2. Can be replaced respectively Trolley Mounted Air Breathing Apparatus(SCBA), underground firefighting respirator, fire fighting ... pipe, Reducer, air supply valve and full face mask, etc.Configuration 4 or 2 carbon fiber cylinder ( 6.8L or 9L ... caused by collision or friction. 6. The Reducer valve with large-flow output can ensure sufficient respiratory flow. 7. ...