Last Updated：2025/11/21
Sentence
施工業者は、断熱性を高めるために空洞壁内に密閉空気層を設けることを推奨しました。
Quizzes for review
The contractor recommended installing a dead-air space in the cavity wall to improve thermal insulation.
See correct answer
The contractor recommended installing a dead-air space in the cavity wall to improve thermal insulation.
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