此纲要（草案）在北京清河毛纺厂试点，业已取得明显效果。

This draft has been applied in Beijing Qinghe Wool-Weav…

youdao

此纲要（草案）在北京清河毛纺厂试点，业已取得明显效果。

This draft has been applied in Beijing Qinghe Wool-Weav…

youdao