... a hole →finish turning(FT) → polishing Processed andTesting Equipments Center-less grinder, surface ... machine,CNC milling machine,polishing machine, engine lathe,Projector (imported from Japan),wire EDM machine AdvantageAccuracy:Inside ... diameter can be controlled with 0.005mm, concentricity can be controlledwithin 0.01mm.Design:according the product stand machine ...