[thirty] The width on the keys was marginally in excess of two in addition to a half inches, large more than enough being struck down with the fist, because the early keys are noted to have invariably been manipulated.[31] It experienced twenty bellows operated by 10 Adult males, as well https://vocal.media/art/elevating-craftsmanship-the-charm-of-ceramic-pipes-by-cosmos-art-ceramics