Envelope factories use many different types of paper, from top quality vellum to craft paper.

信封厂使用很多不同类型的纸张，从顶级的犊皮纸到牛皮纸。

youdao

Envelope factories use many different types of paper, from top quality vellum to craft paper.

信封厂使用很多不同类型的纸张，从顶级的犊皮纸到牛皮纸。

youdao