Vastassuunavarbotsakust tingitud kohahälve sfääril annab kasutajale aimu mõõtesüsteemi suutlikkusest, kui mõõdetakse nt väntvõlli laagrikaelade koaksiaalsust, kasutades vastassuundade varbotsakuid.
Opposing-styli projected location error on a sphere is gives the user an indication as to the performance of the system when measuring, for example, co-axiality of crank shaft journals using styli from opposing orientations.
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