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.
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。
The concern of pump is the increased thermal cycling and vibratory loads.
泵的关注增加的热循环和振动载荷。
The concern of pump is the increased thermal cycling and vibratory loads.
泵的关注增加的热循环和振动载荷。
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