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