46In order to be able to classify a product as a ‘part’, it is not sufficient to show that, without that product, the machine is not able to function properly. It remains necessary to establish that the mechanical or electrical functioning of the machine in question is dependent upon that product (judgments in HARK, EU:C:2013:824, paragraph 36 and the case-law cited, and in Data I/O, EU:C:2014:331, paragraph 35 and the case-law cited).
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