The invention belongs to the field of animal health and in particular the causative agent of a new bacterial poultry disease, Gallibacterium. The pinned layer and the tunnel barrier layer have sidewalls formed through etching. The partition wall is formed on the back plate to divide the inner space of the back plate into at least one upper guiding channel communicating with the compressing chamber in the compressor and at least one lower guiding channel communicating with the motor chamber of the compressor. The used arrangements and the unused placements, associated with a type of the co-processor, may be stored in a configuration matrix.