"Chelyabinsk Tractor Plant (Russian: Челябинский тракторный завод, romanized: Chelyabinskiy traktornyy zavod, abbreviated ЧТЗ, ChTZ) also known as CTZ-Uraltrak (ЧТЗ-УРАЛТРАК) is a tractor plant in the Russian city of Chelyabinsk." - (en.wikipedia.org 30.01.2020)
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