This is the 5901st most frequent Russian word.
ремонтных
"Repair" or "maintenance" (adjective form).
The word 'ремонтных' is used as an adjective describing 'materials', indicating that they are intended for repairs or construction-related purposes.
Мы заказали доставку ремонтных материалов на стройплощадку.
We ordered the delivery of repair materials to the construction site.
Here, 'ремонтных' modifies 'mechanisms', signifying that the mechanisms being updated are related to repair activities.
Бригада рабочих занималась обновлением ремонтных механизмов.
The team of workers was engaged in updating the repair mechanisms.
In this sentence, 'ремонтных' qualifies 'tools', denoting that these tools are specifically designed or used for repairs.