Connecting with working practice, this paper tries to draw up the quantity value source-tracingchart of the measuring instruments, and puts forward some concrete methods.
结合工作实践对绘制计量器具的量值溯源图进行了一些尝试，提出了一些基本做法。
2
A strictly dynamic closed loop processing control flow chart was formed by means of global tracing, customer feedback and product improvement.