lokaator või osutusseadis, milles kasutatakse keskme ümber pööratavat kuuli
a stationary pointing device that contains a movable ball rotated with the fingers or palm. From one to three keys are located in various positions depending on the unit.
... Pointing device (so-called 'trackball'), consisting of printed circuit on which are mounted an optical encoder in the form of a monolithic integrated circuit and a housing comprising a ball and a retainer ring, for use in the manufacture of products falling within subheading 8471 30 00 (a) ...
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