The invention provides a clock select circuit and method which uses feedback arrangements between latches in different branches, with each branch for coupling an associated clock signal to the circuit output. The bonnet can satisfy impact absorbing performance and predetermined required performance for deformation in a collision accident etc. Thus, the noise absorbing material is earthed to the vehicle body so that it is possible to prevent static electricity from being generated in the use of the fuel cell vehicle such as in a low humidity environment. Sequences of one or more of these packets create unique encoding \u201ccommands\u201d that can be sent over any network and easily decoded with either software or hardware. Using such functionality, the image detection manager compares rows of the run length encoding data from the candidate image to rows of run length encoding data from the target image, and determines whether the target image is present in the candidate image. The valve assembly is removable to provide access to a first suction passageway and a second suction passageway for cleaning purposes.