siamesed backrack of grand piano <NEW>
J.SDER Piano Co., Ltd. [China]
backrack researched and developed by ourself .mulitilayer compressive stress raise the stability of the music intonation level.
siamesed backrack of grand piano <NEW>
backrack researched and developed by ourself .mulitilayer compressive stress raise the stability of the music intonation level.
siamesed backrack of grand piano <NEW>