Você procurou por: tachometer (Inglês - Letão)

speedometer, tachometer and hour meter (if fitted)
spidometrs, tahometrs un hronometrs (ja ir)

the tachometer must be a separate one from the one of the vehicle.
tahometrs nedrīkst būt transportlīdzekļa tahometrs.

tachometer and hour meter (if fitted): yes/no (1)
tahometrs un hronometrs (ja ir): ir/nav 1

the engine speed is determined by means of a tachometer having an accuracy of 3 % or better.
motora apgriezienus nosaka ar tahometru, kam precizitāte ir 3 % vai augstāka.

the engine speed shall be determined by means of a tachometer having an accuracy of 3 % or better.
dzinēja apgriezienu skaitu nosaka ar tahometru, kam precizitāte ir 3 % vai labāka.

the rpm speed of the engine shall be measured by means of an independent instrument, e.g. a roller bed and a tachometer.
apgriezienu skaitu minūtē mēra ar atsevišķu ierīci, piemēram, cilindriem aprīkotu darbagaldu un tahometru.

the speed of the motorcycle or motor tricycle is measured by means of a precision tachometer or deduced from measuring the time over a given distance on a flat dry road in both directions with the stop closed.
motocikla vai mototricikla ātrumu mēra ar tahometru vai izsecina, mērot laiku noteiktā attālumā uz līdzena un sausa ceļa abos virzienos ar noslēgtu aizturi.

tachometers
tahometri