| 摘要 |
The head of the extinguisher has two regions: a region 2, the exit for the extinguishing product, without the obstacle of the valve, and another region 5, the gauge which, by means of manual pressure, connects with the gas- retention valve 7 and indicates the pressure which exists, at the time the manometer is pressed, inside the extinguisher. When pressure on the gauge ceases, it returns to zero. <IMAGE>
|
