Fēngxiāng (-)
original: 风箱
device with a pedal to help push air into the air chamber of a circular (cup/bowl-shaped) wind chest
Defined by Wong as a device "to help push air by pressing of a pedal, allowing notes to be played for a longer period of time, even though no blowing has been effected", adding that "Such a device is rarely used in modern Chinese orchestras".
Wong, Samuel Shengmiao: Qi’ - An instrumental guide to the Chinese orchestra. Singapore, 2005, p.144.
汉英词典 (Hàn Yīng cídiǎn) / A Chinese-English dictionary. 北京 [Běijīng], 1985, p.202 & 754.