Actually it is about constructing the device in such a manner that it can be completely disassembled for maintenance and reassembled again. Further, spare parts must be available for a (minimal) period of time to support that and affordable for independent repair-shops. In practice it will be a trade-off between original purchase price, the total involved repair costs, and the willingness of the public to make use of this right. For small cheap devices I doubt that.
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