控制方式：常开；国际标准电压：AC（380、240、220、24）V、DC（110、24）。
实现转向的液压系统由单向阀、常开电磁阀控制。
The hydrostatic system is controlled by the unilateral valves and electromagnetic valves.
报警输出：常开常闭信号，控制排风扇，电磁阀信号。
Alarm output: frequent on or off signal, control exhaust fan, electrical magnetic valve signal.
常开：当线圈通电时，先导孔关闭，阀上腔由活塞节流孔增压和复位弹簧的推力，电磁阀关闭。
Normally Open: When the coil is energized, the pilot hole closed, the valve chamber and pressurized by the piston return spring throttle thrust, the electromagnetic valve is closed.
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