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美国桑尼SUNNY叶片泵35V21A-86B22R
液压液压动力部分采用回路图表示，以表明不同功能元件之间的相互关系。液压源含有液压泵、电动机和液压辅助元件；基本液压回路中的顺序—控制元件（二位四通换向阀）的换向和弹簧复位、执行元件（双作用液压缸）的伸出和回缩以及溢流阀的开启和关闭。对于执行元件和控制元件，演示文稿都是基于相应回路图符号，这也为介绍回路图符号作了。根据工作原理，您可对所有回路依次进行编号。