three position短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 adj.三位置的 Slide valve function of three position directional valve not only affects the working state of hydraulic system but also affects the working performance of implement part when changing direction. 三位换向阀滑阀机能不但影响液压系统的工作状态，也影响执行元件换向时的工作性能。 dictall