日常业务：销售退货、商品入库、退货返厂、商品报损、商品报溢。 库存管理：库存商品查询、库存盘点。 系统设置：本单位定义、权限设置、系统初使化。-Ordinary course of business: sales returns, product storage, returns Depot, reported loss of goods, commodities reported profits. Inventory Management: inventory of goods que