这些必须是出厂材料单原件或责任人签章的真实有效副本。

These must be either original mill certificates or "wet stamped" by responsible person as being true copies.

youdao

这些必须是出厂材料单原件或责任人签章的真实有效副本。

These must be either original mill certificates or "wet stamped" by responsible person as being true copies.

youdao