BT 钻头刀杆
BT30×JTA2-45 BT30×JTA33-45 BT30×JTA6-45 BT40×JTA2-45 BT40×JTA33-45
BT40×JTA6-45 BT40×JTA2-105 BT50×JTA2-45 BT50×JTA33-45 BT50×JTA6-45
BT50×JTA6-105