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。 0 @: g! L6 A. R! v; m . d4 G V" F1 J; `) ONew HTT transmission with a heavy duty clutch for fast, solid engagements that transfers engine energy for additional torque.) D% `: m) c) _$ ?4 S" B& J) V