{HEAD ~ An X ray analysis apparatus} has information about a relationship between selection of a measurement type and a replacement work of {TAIL ~ optical parts} and shows, on a screen of a display, graphical information about optical parts which should be changed, to make it easy for an operator to perform a preliminary work before measurement 
{ HEAD ~ An X ray analysis apparatus } has information about a relationship between selection of a measurement type and a replacement work of { TAIL ~ optical parts } and shows , on a screen of a display , graphical information about optical parts which should be changed , to make it easy for an operator to perform a preliminary work before measurement
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