| 摘要 |
PURPOSE: A vending machine for changing voices is provided to reduce largely a volume of a vessel including helium gas by using a helium gas box formed with silver paper instead of a light a balloon. CONSTITUTION: A vending machine for changing voices includes a helium gas box into which helium gas is injected. The helium gas box is formed with silver paper. The helium gas box is used instead of a balloon including helium gas since the weight of the balloon including the helium gas is so light and the volume of the balloon is so large. The volume of the helium gas box is largely reduced since the helium gas box is formed with silver paper. The helium gas box including helium gas is sold by the vending machine. |
