... soil specimen. It usually adopts four specimens under the different vertical pressure exerted on the specimens to obtain shear stress when ... 1. Area of soil sample:30cm22. Lever ratio:1:123. Vertical Loading: 50,100,200,300,400(Kpa)4. Max. ... mechanism, high precision, low noise, MCU control, variable speed displayed by the controller, easy to operate, ABS vertical type controller, LCD display. ...