materials rate材料率materialsn.原料；素材名词material的复数形式.materials classification材料分类materials delivered note[经] 材料出库单materials transportation物资运输materials purchase order[经] 购买材料定单materials and techniques材料与工艺materials usage variance材料耗用差异Materials Advisory Board器材咨询委员会materials price variance材料价格差异materials planning system材料计划制度materials for making pore造孔剂