液(ye)壓(ya)(ya)(ya)傳(chuan)動(dong)是(shi)以(yi)液(ye)體(ti)(ti)為工作介質，利用液(ye)體(ti)(ti)的壓(ya)(ya)(ya)力能來實現運動(dong)和力的一(yi)種傳(chuan)動(dong)方(fang)式(shi)。一(yi)般而言，能夠實現某種特(te)定(ding)(ding)功能的液(ye)壓(ya)(ya)(ya)元(yuan)件(jian)的組合(he)(he)，稱(cheng)為液(ye)壓(ya)(ya)(ya)回(hui)路，而若干特(te)定(ding)(ding)的基本功能回(hui)路連(lian)接或復合(he)(he)而成(cheng)的總(zong)體(ti)(ti)則稱(cheng)為直流液(ye)壓(ya)(ya)(ya)動(dong)力單元(yuan)。直流液(ye)壓(ya)(ya)(ya)動(dong)力單元(yuan)通(tong)常都是(shi)由液(ye)壓(ya)(ya)(ya)元(yuan)件(jian)（動(dong)力元(yuan)件(jian)、執行(xing)元(yuan)件(jian)、控制(zhi)元(yuan)件(jian)、輔(fu)助元(yuan)件(jian)）和工作介質兩大(da)部分組成(cheng)。

直流液壓動(dong)力(li)單元(yuan)型號規格(ge)：