Especially for commercial vehicles, mobile hydraulics, and similar applications where IP67 or IP6K9K may be required.
特别是商用车辆，移动液压和类似应用中等级IP67或IP6K9K可能需要。
Therefore the research of pump-control-motor closed-circuit for mobile hydraulics driving system and key hydraulic components will have great significance.
因此对工程机械行走驱动泵控马达闭式回路系统及关键液压元件开展研究将有重大意义。
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