| 摘要 |
<p>The circuit (200-1) has two hydraulically operatable non-return valves (210-A, 210-B) provided between respective working lines (A, B) and a return line. A solenoid operatable two/two-way-seat valve (220) hydraulically controls the non-return valves. The non-return valves have control inlets (208-A, 208-B) that are connected by the two/two-way-seat valve with the return line. The control inlets are connected with an inlet of a shuttle valve (216). An outlet of the shuttle valve is connected with the two/two-way-seat valve.</p> |
