本工艺是在不加惰性气体保护的密闭系统内完成的，产品纯度达99.99%以上，萃取收率大于98.5%。

The purity of product comes up to 99. 99 %, and the rate of extraction is more than 98. 5 %.

youdao

本工艺是在不加惰性气体保护的密闭系统内完成的，产品纯度达99.99%以上，萃取收率大于98.5%。

The purity of product comes up to 99. 99 %, and the rate of extraction is more than 98. 5 %.

youdao