... iron,without welding,no uncrew,joining together,exercise more stable and import the ball screw,long life and high precision2.high-power inventer ... simulation display function.4.It can save 10 breakpoints and a breakpoints renewal carved function power to work is ... can avaiable different materials,marble,granite,jade,stone,black stone and ceramic,glass,organic glass,board,PVC,aluminum-plastic plate, ...