1. Such explosive effect has actually happened when the piano was tampered with by a novice, or where there was a flaw in construction.

이러한 폭발적인 사고는 미숙련공이 ‘피아노’를 함부로 다루었을 때와 ‘피아노’에 조립상의 결함이 있었을 때에 실제로 발생했다.