High purity zinc oxide powder is an important industrial raw material and its economic value is high.

高纯氧化锌粉是一种重要的工业原料，具有很高的经济价值。

youdao

High purity zinc oxide powder is an important industrial raw material and its economic value is high.

高纯氧化锌粉是一种重要的工业原料，具有很高的经济价值。

youdao