It has four mechanical shifts, and its speed could be adjusted by hydraulic pressure with stepless speed change.
它有四个主要的机械位移，其速度可以调整，由液压压力与无级调速改变。
The winch adopted valve-controlled proportional speed regulation hydraulic drive and PLC control to realize stepless speed change of the winch drum and coordinating control of the cable layer.
管线绞车采用阀控比例调速液压驱动、LC控制，实现了卷筒的无级变速和排缆器的协调控制。
Total hydraulic pressure, rear wheel drive, frequency and radiation conversion, articulated direction change, two stepless speed changes, advanced technology;
工况施工。全液压、后驱动、变频变辐；铰接转向、二档无级变速，技术先进；
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