A method for forming features in a polysilicon layer is provided. A controller determines a current estimated cylinder air flow signal, determines a MAF transient signal and determines a MAP transient signal. A pusher block is linked to the shaft, and has a forward surface configured to engage the spinal implant. A part of the disk is exposed to the front surface side from a slit of the panel, and the disk is rotated to move the movable piece, whereby changing a resonant frequency of a ventilation space of the sound box and a ventilation cross. Computer management complexity and information technology management costs are reduced by centralizing computer management on the native operating system.