Thus, the highest frequency maintenance component, the nozzle, is removed without moving or removing {TAIL ~ any other component} in the chamber, such as {HEAD ~ the mirror} 
Thus , the highest frequency maintenance component , the nozzle , is removed without moving or removing { TAIL ~ any other component } in the chamber , such as { HEAD ~ the mirror }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD