·? (bag [Term not mentioned in available sources])
air reservoir: flexible (usually of animal skin), ready for the insertion of stocks
Held in front, against the chest of the player.
Атлас музыкальных инструментов народов СССР = Atlas of musical instruments of the peoples inhabiting the USSR [1963]. Вертков, Константин А. (Vertkov, Konstantin A.) / Благодатов, Георгий И. (Blagodatov, Georgij I.) / Язовицкая, Эльза Э. (Jazovickaja, El’za E.). Москва (Moskva), 1975 (2), p.72 / 208 (type only, no term).