In the case that the sound processor is connected to {HEAD ~ a plurality} of {TAIL ~ common buses}, the bus interface means is also required for each of the common buses 
of
In the case that the sound processor is connected to { HEAD ~ a plurality } of { TAIL ~ common buses } , the bus interface means is also required for each of the common buses
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH