Provide are fluororesin and silica compositions having a low coefficient of thermal expansion. The rotation sensor 50 is provided on a position corresponding to a position between a deepest portion 41 of a cylinder hole 29 and a rear end face 28 of the cylinder block in an axial direction of the cylinder block. Alternatively, the automatic testing equipment may be provided with an imaging device, e. The indicator may be a mark so shaped that a position of an internal end of an outwardly exposed part thereof is varied in a terminal axial direction corresponding to the crimp level, or include a plurality of marks spaced in a direction perpendicular to the terminal axial direction. In order to enable exhaust gas recirculation in the simplest possible way, it is provided that the exhaust gas recirculation conduit starts out directly from the combustion chamber and the exhaust gas recirculation valve is arranged as a stroke valve which is disposed in the region of the entrance of the exhaust gas recirculation conduit into the cylinder head floor. The belt is wound around the shaft member with an inner end fixed to the shaft member and an outer end extending out from the securing bracket to pass through the screen portion.