... of tungsten carbide tip is fired by vacuum 2.Specification: U47, U82, U84, U92, U94 3.coal mining bits coal ... resist character. Hardfacing if required, Low pressure sintered carbide with suitable grade according to Target Projects, PDC tip ... and accessories for Mining and Mineral ground tool,Foundation drilling,Horizontal directional drilling(HDD),Trenching,Hydraulic millingcutter,Tunnelling,Recycling, ...