No. 6,000 in Russian
следственных
"Следственных" means "investigative" in English.
In a sentence
Следственных действий велось много на прошлой неделе.
Many investigative actions took place last week.
Here 'следственных' acts as an adjective describing the noun 'действий', referring to actions related to investigations.
Он изучил все материалы следственных органов.
He reviewed all the materials of the investigative authorities.
Here 'следственных' describes 'органов', indicating authorities whose function relates to investigations.
Подготовка следственных документов требует тщательности.
The preparation of investigative documents requires thoroughness.
In this sentence, 'следственных' modifies 'документов', describing documents that pertain to investigations.
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