31. When intermittent positive pressure ventilation is available, the fatalities can be reduced to 15 %. 32. The pump creates positive pressure in the fuel lines, pushing the gasoline to the engine. 33. There is a pressure, but it's a positive pressure in that you're always chasing that ." 34. Visitors would only need to wear a mask that supplied 100 % oxygen under positive pressure . 35. Note that the liquid is under positive pressure ( compression ) throughout the tube, not tension. 36. The positive pressure allows air to flow into the airway until the ventilator breath is terminated. 37. This one-way valve is opened by the positive pressure created from gently blowing into the hose. 38. This generates a positive pressure that prevented the ingress of water and rock into the tunnel. 39. Forced draught furnaces usually have a positive pressure . 40. And that will create positive pressure for change.
