{HEAD ~ The main components} of {TAIL ~ the subsystems} are indicated in FIG 1 and in the List of Main Components 
{ HEAD ~ The main components } of { TAIL ~ the subsystems } are indicated in FIG 1 and in the List of Main Components
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH