| 摘要 |
<p>A gas flow regulator comprises an inlet 121 and an outlet 120 that can he closed or opened by a valve 40. The valve is actuated by a timing mechanism that is mounted within two chambers 10 and 11 Separated by a gas-tight membrane, the first chamber 11 containing the timer 20 which activates a first actuator, and the second chamber 12 containing the valve stem and a second actuator 30, the first and second actuators acting on each other through the membrane.</p> |
