目前，数字变量轴向柱塞泵还存在着很多问题。
At present, digital variable displacement axial piston pump has some problems.
液压泵采用恒功率自动变量轴向柱塞泵，以节省能源。
A. Hydraulic pressure ADAPTS constant power variable axial piston pump for energy saving.
为了补偿差动缸面积差和改变泵的输出流量，提出采用并联型三配流窗口的变量轴向柱塞泵方案。
In order to compensate for the area deviation of differential cylinder and change the output flow of the pump, a program of parallel-type of three-window of variable axial piston pump was proposed.
论文主要完成以下研究内容：1。对轴向变量柱塞泵的支撑方式进行了研究。
The main content is as follows: 1. The supporting way of the axial variable displacement piston pump is researched.
目前，轴向变量柱塞泵的关键技术掌握在国外公司手中，国内的研究、生产、制造均还处于初级阶段。
At the present, the key technology of the axial variable displacement piston pump is grasped by the foreign companies, the research and manufacture level in our country are on the elementary stage.
目前，轴向变量柱塞泵的关键技术掌握在国外公司手中，国内的研究、生产、制造均还处于初级阶段。
At the present, the key technology of the axial variable displacement piston pump is grasped by the foreign companies, the research and manufacture level in our country are on the elementary stage.
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