a main equipment including an optical system for performing an X ray analysis of a sample, {HEAD ~ the optical system} comprising {TAIL ~ an X ray source}, an X ray detector, and optical parts therebetween that are classified into a plurality of categories so that the optical parts installed in the main equipment are exchangeable with other optical parts belonging to the same category 
comprising
a main equipment including an optical system for performing an X ray analysis of a sample , { HEAD ~ the optical system } comprising { TAIL ~ an X ray source } , an X ray detector , and optical parts therebetween that are classified into a plurality of categories so that the optical parts installed in the main equipment are exchangeable with other optical parts belonging to the same category
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH