noun
open frame
Loanword from English; used in technical contexts such as computing, electronics, or manufacturing to describe a frame or chassis that is open rather than enclosed.
このサーバーはオープンフレーム設計で、冷却効率が高い。
This server has an open-frame design, so cooling efficiency is high.
オープンフレームの電源ユニットをラックに取り付けた。
I mounted an open-frame power supply unit in the rack.