... Industrial Park.The total area is 14,000 m 2 ,and building area is up to 8,700 m 2 .Our ... products are Diamond Core Bits(Reaming Shells,,Core Barrels and accessories,Overshot,Drill rods and other drilling tools,high frequency welded diamond blade ... , sintered blade, flexible polishing pads, segments, grinding wheel, gangsaw blade and steel core.