noun🔗Share背もたれThe back piece of a chair, used to support the sitter's back."The armchair had a comfortable backrest, perfect for relaxing after a long day at work. "そのアームチェアには快適な背もたれがあり、仕事で長い一日を過ごした後のリラックスに最適でした。partitembuildingarchitectureutilitywearChat with AIVocabulary GamePractice Reading
noun🔗Share心押し台A guide attached to the slide rest of a lathe, and placed in contact with the work to steady it in turning."The machinist carefully adjusted the backrest on the lathe to prevent the long, thin metal rod from vibrating during the turning process. "旋盤工は、長い細い金属棒が旋削中に振動するのを防ぐために、旋盤の心押し台を慎重に調整しました。technicalmachineworkdeviceChat with AIVocabulary GamePractice Reading
