バックフィット

noun, noun or participle which takes 'suru'

backfit; retrofit; backfitting; retrofitting

Technical term for modifying existing equipment, systems, or structures to incorporate new features or meet new standards. Used as both a noun and a suru-verb.

• 古ふるい工こう場じょうの機き械かいをバックフィットして、省しょうエネ性せい能のうを高たかめた。

  They retrofitted the old factory's machinery to improve energy efficiency.

• この建たて物ものは耐たい震しんバックフィットが必ひつ要ようだ。

  This building needs seismic retrofitting.