A bone spreader includes two tubular pin holders which are connected to one another by a parallel guide system, and two pins that are configured to be connected to the bone parts that are to be spread apart. An interleaving unit interleaves the LDPC-coded data, based on an array according to the number of bits that constitute a modulated symbol. The neck forms an annulus between the neck and the nozzle body in fluid-passing contact with the first passageway section and head section to direct fluid from the first passageway through the head passageway for exit through the spray bore.