switching, in accordance with a request from a user who uses said information related to state of degradation, said information to be displayed to {HEAD ~ said user} to {TAIL ~ any} of said first to third display items 
to
switching , in accordance with a request from a user who uses said information related to state of degradation , said information to be displayed to { HEAD ~ said user } to { TAIL ~ any } of said first to third display items
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH