A method and apparatus for transmitting and receiving image data and control characters across an interface that is subject to noise for output to a printer. The apparatus includes a machine having a frame structure, at least two sets of rollers, a mechanism coupled to the rollers to push andor pull the mat through the machine, a cleaning solution application system, a scrubbing system, a cleaning solution removal system, and a housing to enclose the machine. The default gateway includes a list of Internet egress points that correspond to the default gateway. An extended correction amount map is generated indicating a correlation between the estimated values of the rotating speed, the load factor, and the correction amount while the opening degree is maintained at a reference opening degree and the EGR rate is maintained at a target rate. When the bicycle is folded, the front and rear wheels are located separately, each at one side of the beam and within the concave section of the S-shaped beam, so that the bicycle is more compact and has a less width after being folded.