| 摘要 |
<p>The device has a display screen (6) for displaying values of operating parameters of the device, and input units comprise of multiple buttons and provided for determining reference values of the operating parameters. The input units are provided for switching between two operating modes such as a normal operation mode and a maintenance operation mode, where magnitude of the operating parameter that is displayed on the display screen in the maintenance operation mode is equal or greater than that in the normal operating mode.</p> |
