Fan, blow tube and skin sac, first used to force the wind instrument
Water model
Water model
It's a fan and a blowpipe. The ancient Egyptian goldsmiths had used a blowpipe with a windpipe, and the Inca sometimes used eight to twelve copper tubes. Later, the invention USES the animal skin to make the wind skin sac, the two ends of the capsule to set the air duct and by the operator's hand control. This kind of humble blower is still used in some areas in modern times. The mural of the tomb of Rekhmir, the 18th king of Egypt, has been painted with a can-shaped foot wind device. When entering the wind, the operator USES the rope to pull up the skin sac, then step down, to blast the wind into the furnace, and each furnace is equipped with four sets of blower, and the two of them operate together.