An EGR passage partially refluxes exhaust gas to a combustion chamber as an EGR gas. The fluororesin fiber paper is a porous sheet obtained by forming a slurry comprising fluororesin fiber into a sheet by a wet paper making method and sintering the resultant sheet and has an average pore diameter of 0. The block selection circuit includes an input to receive a class code and circuitry to output a plurality of select signals to the plurality of CAM blocks. By integrating the telephone and the computer, the user can transfer wireless data much more easily. The plurality of base lines are partly perforated and partly cut, or half of the base lines are fully cut and the other half of the base lines are partly cut and partly perforated.