1) The main structure consists of top and base frames welded of Y-steel;
inner and outer up-down supporting arms made of extra-thick steel
plates, giving machine a good rigidity and a high bearing capacity
2) The hydraulic unit, motor and stopping device are all of internal
secret design, which gives a pleasant appearance and saves useful space
3) The operation is controlled by foot, preventing the operator from
doing other work with his hands
4) The cylinders are over-designed to a diameter of 100mm, at their
connections with supporting frame; spherical knuckled bearings are used
in order to prevent the bearing accident arising from uneven load or side
force