本文件规定了与产品质量相关的受控回路和材料转化步骤的定义，尤其是回收输入和输出以及型材制造输入和输出。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies the controlled loop and the definition of those material transformation steps which are relevant for product quality, in particular recycling input and output and profile manufacturing input and output.All current amendments available at time of purchase are included with the purchase of this document.