| 摘要 |
<p>A method and system for supplying gas to an external machine such as an anaesthetic machine in which gas is supplied to and exits from the machine (3) such that it forms part of a closed gas conduit loop (10) in which there is a variable volume reservoir (7) which adjusts and maintains pressure in the gas supply in the conduit (10) The variable volume reservoir (10) incorporates an excess pressure safety and an under pressure safety valve.</p> |
