Brief introduction of celestite
Mustel Victor of Paris invented the piano. His son (mustel, August) applied for a patent and officially owned this instrument. The original pronunciation used a series of tuning forks, also known as steel forks. 1886 was officially named Pianput. Actually, Pianput's soundbar and speakers are all made of aluminum. Originally a proprietary product, but now the patent right has disappeared, so a low-level musical instrument began to appear.