切れ味、耐久性に優れた高級ハイス鋼 MIYANAGAミヤナガ高速钻头SLB1014, MIYANAGAミヤナガ高速钻头SLB1015,SLB1016, SLB1017, SLB1018, MIYANAGAミヤナガ高速钻头SLB1019, MIYANAGAミヤナガ高速钻头SLB1020, SLB1021, SLB1022, SLB1023, MIYANAGAミヤナガ高速钻头SLB1024, MIYANAGAミヤナガ高速钻头SLB1025, SLB1026, SLB1027, SLB1028, MIYANAGAミヤナガ高速钻头SLB1029, MIYANAGAミヤナガ高速钻头SLB1030, SLB1031, SLB1032, SLB1033, MIYANAGAミヤナガ高速钻头SLB1034, MIYANAGAミヤナガ高速钻头SLB1035, SLB1038, SLB1040, SLB1042, MIYANAGAミヤナガ高速钻头SLB1045, MIYANAGAミヤナガ高速钻头SLB1050, SLB1053, SLB1055, SLB1060, SLB1065