{HEAD ~ A system} is provided for simulating {TAIL ~ an operating environment} of a power plant control room  
is provided for simulating
{ HEAD ~ A system } is provided for simulating { TAIL ~ an operating environment } of a power plant control room
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH