Itemset项集itemn.项目；条款；一件商品（或物品）；一则或一条新闻adv.也Item Support Plan Policies Statement物资支援计划方针声明item-by-item sequential inspection逐项顺序检查, 逐个顺序检验Item Standardization Information System物资标准化信息系统item-by-item sequential sampling plan逐项连续取样Item Manager Wholesale Requisitions Process物资管理员批发申请程序item-by-item sequential sampling inspection逐项逐次抽样检验