... load frames, high-precision load sensors, electric-hydraulic servo closed loop control system (including function generators ... data processing, drawing, displaying curves and printing. 1. The body adopts four columns with hydraulic locking cylinders for ... oil pumps), one-way valves (Leemin Hydraulic), overflow valves (Leemin Hydraulic), hydraulic gauges (Leemin Hydraulic) etc. which also have functions ...