液压行走，采用进口行走泵和行走马达，无级变速。
这两个人都没有进行过更换泵模组的训练，但是曾经在一起进行了广泛的太空行走。
The two have not trained for a pump module replacement but had extensive spacewalk training together.
同时，发动机转速的恒定也使液压泵输出排量稳定，进而保证了行走速度和振动频率的稳定，提高了压实质量。
At the same time, constant engine speed stabilizes output displacement of hydraulic pump and then stabilizes travel speed and vibratory frequency in turn, so that compaction quality is increased.
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