Direct materials include all materials that from an integral part of the finished product and are easily traced to the finished product. 直接材料指的是构成完工产品主体部分、并能较容易就可追溯到制成品上的所有材料。
In automobile gearbox production, the normalizing quality of forgings directly affect the machining of part and the quality of finished product. 在汽车变速箱生产中,锻件的正火质量,直接影响着零件后续机加工及最终成品率;