... hole and special shape parts in copper, plumbago, steel.J. Lubricating system is used callback way, lubrication of rail is completed ... PCB boards is moistureproof, anticorrosive, gold-filled. (2)CNC system technical performanceA. There is automatical A.R.C carbon surveillant ... are some safe devices in circuit. a. Self-diagnostic system and LED state display, convenient to examineand repairb. Oil ...