The apparatus and {HEAD ~ method} utilizes a leaky bucket routine and {TAIL ~ an event handler procedure} 
utilizes
The apparatus and { HEAD ~ method } utilizes a leaky bucket routine and { TAIL ~ an event handler procedure }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL