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Explanation: It's just a small precision. Mats Wiman has given a good answer – except that you spoke about a disk (US Englsh) – He deserves the KudoZ points. Such a disk keeps track of all driving events.
just type tachograph on google, you'll get dozens of examples
Yves Georges France Local time: 02:28 Native speaker of: French PRO pts in pair: 185