The discharge energy applied to the medium causes {TAIL ~ an expansion} of the medium, which in turn causes an expansion of {HEAD ~ the sealed container} 
The discharge energy applied to the medium causes { TAIL ~ an expansion } of the medium , which in turn causes an expansion of { HEAD ~ the sealed container }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD