自动售货机，支持5种商品的预设数量，价格，可以选择购买商品及其数量，可以输入0.5,1.5三种金额。支持找零。-Vending machines, supports five kinds of commodities preset quantity, price, and quantity of goods you can choose to buy, you can enter the amount of three 0.5,1.5. Support homing.