insoluble bromide ratio — гексабромное число
overall ratio — суммарное передаточное число
selection ratio — допустимое число обращений
overall gear ratio — общее передаточное число
ratio of roll — передаточное число цепи обката
English-Russian big polytechnic dictionary. 2014.
direct drive — When the gearing is such that the crankshaft and driveshaft revolve at the same speed, the vehicle is in direct drive. Usually this occurs in high gear (except for those with overdrive). It is represented as 1.00:1 ratio … Dictionary of automotive terms
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