在国防工业生产中,成品及在制品的批次管理、材料炉号和牌号的管理是质量管理的一个重要环节。这些工作也是建立产品档案制度的基础工作,因为要建立产品档案制度,首先要实行在产品零部件上做记号的留名制度和编号制度。以往人们一般常用打钢印、风动刻笔、电刻笔或酸印等办法在 In national defense industrial production, the management of finished products and in-process batches, the management of material heat numbers and grades are an important part of quality management. These tasks are also the basic work for establishing a product file system. To establish a product file system, we must first implement the system of renaming and numbering the product components. In the past, people generally used to play steel stamping, wind engraved pen, engraved pen or acid etching method