| 摘要 |
<p>The flushing device (15) has an extraction valve (16), which is connected with a working line (6) of a circuit by an extraction line (18) and with another working line (7) of the circuit by another extraction line (19). The both extraction lines are connected during a pressure difference below the threshold value. Units (22,23) are provided for the prevention of a hydraulic short circuit.</p> |
