切换 alt; automatic switchover; blocked out; changeover; handover ho; shear; throw-over; to cut over; to switch over to, switch---to throw--over switching over; to switch over to, switch、to throw、over switching over; to switch over to, switch―to, switching over; toggle; toswitchoverto,switch---tothrow--overswitchingover; transition
The test signals are given by the signal generator and the characteristic curves are drawn by the x - y recorder . before the test , the coordinates of the x - y recorder are demarcated and the shifts of the test oil circuit are done manually . the parameters of the characteristics are also computed manually 在每次测量前需要手动标定x - y记录仪的坐标以及切换测试项目间的油路,测试曲线绘制完成后也需要手动计算电液伺服阀的各项性能参数。