{HEAD ~ Each surrounding body} 10 is {TAIL ~ a thin metal plate}, the area of which can be adjusted as desired 
is
{ HEAD ~ Each surrounding body } 10 is { TAIL ~ a thin metal plate } , the area of which can be adjusted as desired
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH