The system includes {TAIL ~ an exterminating liquid supply subsystem} and {HEAD ~ an exterminating liquid distribution subsystem} 
The system includes { TAIL ~ an exterminating liquid supply subsystem } and { HEAD ~ an exterminating liquid distribution subsystem }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD