Breakdown of Библиотека оснащается новыми компьютерами.
Questions & Answers about Библиотека оснащается новыми компьютерами.
In Russian, verbs like оснащаться use the instrumental case to indicate the means or instrument (“what it is equipped with”). There is no separate preposition for “with” in this structure—the instrumental case alone carries that meaning.
– новыми: instrumental plural of новый (“new”)
– компьютерами: instrumental plural of компьютер