介绍硬质聚氯乙烯（PVC U）异型材在储存、成窗的过程中产生变色的原因及其预防措施；

The cause of color-changing of unplasticized polyvinyl chloride(PVC-U) profile in the process of window-making and storage and its prevention are presented.

youdao

介绍硬质聚氯乙烯（PVC U）异型材在储存、成窗的过程中产生变色的原因及其预防措施；

The cause of color-changing of unplasticized polyvinyl chloride(PVC-U) profile in the process of window-making and storage and its prevention are presented.

youdao