In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide {HEAD ~ a thorough understanding} of {TAIL ~ the present invention} 
of
In the following description , for the purposes of explanation , numerous specific details are set forth in order to provide { HEAD ~ a thorough understanding } of { TAIL ~ the present invention }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL