The casing includes {HEAD ~ a casing body} having an upper casing member and {TAIL ~ a lower casing member} joined together 
having
The casing includes { HEAD ~ a casing body } having an upper casing member and { TAIL ~ a lower casing member } joined together
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH