This is the 2883rd most frequent Russian word.
бронетехники
Armored vehicles or military armored equipment.
Here, 'бронетехники' is in the plural form, referring collectively to armored vehicles.
Современные бронетехники используются в армии для защиты и атаки.
Modern armored vehicles are used in the army for defense and attack.
In this sentence, 'бронетехники' is also plural and represents preserved specimens of armored vehicles.
Музей представил коллекцию исторической бронетехники, которая использовалась в прошлом.
The museum showcased a collection of historical armored vehicles that were used in the past.
Here, 'бронетехники', in the singular form, refers to the general concept or category of armored vehicles.