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Tachometers, umeme
Tachometers na tachographs, umeme
Tachometer mafungo
Kelele wastani mita, redio, kwa matumizi ya viwanda
Laser kasi mita
Mnachuja viwango
Kupima vyombo, ukolezi ufumbuzi, umeme au elektroniki
Vifaa vya kupima, laser na Maser pato
Darasa la atomiki frequency mita
Vifaa vya kupima, laser pato, macho
Mapigo counters na recorders, umeme
