它们来源于焦油一炼油的残留,它被用于橡胶和有些塑胶的增塑剂。它有以下背景

它们来源于焦油一炼油的残留,它被用于橡胶和有些塑胶的增塑剂。它有以下背景的英文翻译

基本释义

• They come from tar-oils, i. E. Residues from oil refining, which are added to the rubber as p; asticizers, This has the following background