vendorn.自动售货机；小贩；卖方；供货商=vendervendor sensation model供应商感知模型vendor managed inventor供应商管理库存Vendor Independent Mail厂商独立邮件vendor source selection供方资源选择Vendors' classification累进控制vendor part modification售主部件更改Vendor Managed Inventory厂商控制的存货目录vendor performance index卖主债效指数vendor selection problem供应商选择vendor evaluation system供应商评估系统