A secondary trailer hitch is provided by the present invention for allowing the lineal, straight, reverse movement of one or more vehicles in tow behind a prime mover. Adopting the layout information calibrating method and device submitted in the present invention, it is possible to not only effectively avoid calibrating mistakes in the layout production process, but also reduce layout production accidents, accelerate the whole production schedule of the newspaper. A side rake angle distribution of the cutters is adjusted at least along a cone region of a blade of the fixed cutter drill bit to change the performance characteristic of the fixed cutter drill bit.