又看了一下冰钻的解释,说是最新科技,New high torque 2 H.P,可以用8‘, 9’,10‘三种钻头,应该没有问题。 % k. D+ k% M) ^( H6 u' m " Z2 ?, l \$ oNew HTT transmission with a heavy duty clutch for fast, solid engagements that transfers engine energy for additional torque.- P( u/ d4 r3 B) ^) U/ k