{HEAD ~ The control} of the switch position may be manual or may be controlled by {TAIL ~ a central processing unit} 10 
controlled by
{ HEAD ~ The control } of the switch position may be manual or may be controlled by { TAIL ~ a central processing unit } 10
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH