... : 1.Use 100% virgin raw material 2.ISO9001 3. For coal industry, etc 4.From state-owned company ApplicationRecommend GradeTBM cutterG215 ... , YJ2.1R, YJ2.2R, G508, G809, B30, B35, B40, B45Coal cutting bitsG215, G216, G210, G413, G212, G313, G510, G508, G809Oil well ... ; Milling cutterB30, B35, B40, B45 Hi-quality tungsten carbide inserts tips