... liner error compensation 4,axis:1,2,3 cylindrical grinding machine readoutfunction 1:zero clearing 2:reset 3:mm/inch ... and rotary encoderadvantage:1,the high precision digital readout is specialization design,elegant appearance ,high speed of numeation,multy ... wear-resisiting,good shield.3,independent power,widely used,high stabilization,capacity of resisting disturbance well4, the power source ...