| 摘要 |
<p>A combination switch including a pressure switch moveable between closed and open positions in response to a working pressure of a fluid, an unloader valve moveable between open and closed positions, a mechanical interconnection between the pressure switch and the unloader valve and operable to move the unloader valve in response to movement of the pressure switch, and a mechanical lever selectively operable to move the pressure switch between the closed and the open position.</p> |
