MTB 钻头套筒 (螺丝锁紧) BT30×MTB1-45 BT30×MTB2-60 BT40×MTB1-45 BT40×MTB2-45 BT40×MTB3-75 BT40×MTB4-90 BT50×MTB1-45 BT50×MTB2-45 BT50×MTB3-60 BT50×MTB4-75 BT50×MTB5-120