Sítko (malé & hrubé ~) (n)
reed protection (inside the bag), rendering even air supply and protecting the reeds against pollution from the bag
Cloth membrane on chanter and drone stocks (inside the bag), rendering even air supply and protecting the reeds against pollution from the bag.
Širola, Božidar: Sviraljke s udarnim jezičkom [Aerophones with a beating tongue]. Zagreb, 1937, p.362 (Slovakia).