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English definition of “tachograph”

tachograph

noun [C]     /ˈtæk.ə.ɡræf/ /-ɡrɑːf/ US  /-ɡræf/
a machine inside a vehicle such as a truck that records speed, distance travelled, and stopping periods, used to control the driver's legal hours of workThe interior of vehicles
(Definition of tachograph noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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