| 摘要 |
<p>A breathing apparatus comprises a source of high-pressure air that supplies a breathing device (14) through pressure reducers (12 and 14). At the outlet of the source there is a non-compensated first pressure reducer (12) that provides medium pressure that is a preset function of the high inlet pressure. A second compensated reducer (15), near the breathing device (14) is connected through a pipe (13) to the outlet of the first reducer (12) to receive medium pressure therefrom, reduce the medium pressure to breathing pressure and send the medium pressure to the breathing device (14). A device (16) indicating the pressure of the source is connected between a first and second reducer to detect the medium pressure and provide, on the basis of the medium pressure detected and said preset function, an indirect measurement of the high pressure of the source.</p> |
