| 摘要 |
<p>The system has a movable contact part (31) interconnecting fixed contact parts (4, 4`) fixed to a tank. The parts (4, 4`) are connected by respective wires (5, 5`) to a detection circuit (6) which detects an electrical continuity between the parts (4, 4`). An electrical resistor (8) interconnecting the parts (4, 4`), is placed in a sealing device for ensuring a sealing between the parts (4, 4`) and walls of an opening of the tank.</p> |
