China K10/K20/K30/K40 Solid Cemented/Tungsten Carbide Rod/Round Bar/Welding/Brazing Rod Blanks, Find details about China Tungsten Carbide Rods, Sintered Carbide Rods from K10/K20/K30/K40 Solid Cemented/Tungsten Carbide Rod/Round Bar/Welding/Brazing Rod Blanks