... without welding,no uncrew,joining together,exercise more stable and import the ball screw,long life and high precision2.high- ... 5.It can used in many filde,such as the stone,stone processing,art,advertisement,decration industry relife,ceramics6.It can avaiable ... different materials,marble,granite,jade,stone,black stone and ceramic,glass,organic glass,board,PVC,aluminum-plastic ...