This lesson chiefly describes several essential problems of writing an application document for magnetic fertilizer.

这一讲着重介绍了磁化肥料发明申请文件撰写的几个基本问题。

youdao

This lesson chiefly describes several essential problems of writing an application document for magnetic fertilizer.

这一讲着重介绍了磁化肥料发明申请文件撰写的几个基本问题。

youdao