... ,Multi-spindle 3-D CNC Deep Hole Drilling Machine is suitable for drilling 3-D or 2-D holes ... is adopted chip moved outer method(gundrulling method)with high efficiency,highaccuracy and high automatic . It can instead of drilling,counting,reaming ... is IT7-IT10,roughness Ra0.8-3.2µm . This machine is widely used for water hole,shoot hole,electril-thermal ...