系统退出系统基本资料往来单位客户资料、供应商资料产品管理产品查询、计量单位、颜色方案员工资料修改员工资料，修改用户名和密码业务管理采购进货根据时间、进货人、供应商查询进货采购退货销售单销售退货应收应付采购付款销售收款报表-System out of the system of basic information between units of customer information, supplier information product management product inquir