Old-fashioned or of an old type; not modern or of an earlier design or style.
この旧式のカメラは操作が難しい。
This old-style camera is difficult to operate.
旧式の設備を新しいものに取り替える必要がある。
It's necessary to replace the old equipment with new ones.
旧式の考え方は時に柔軟性に欠ける。
Old-fashioned ways of thinking can sometimes lack flexibility.