我公司对各种规格的硅微粉均可提供活性硅微粉，沉降时间不少于45分钟。

We also can supply active silica powder of every specification, Sediment time not lower than 45 minutes.

youdao

我公司对各种规格的硅微粉均可提供活性硅微粉，沉降时间不少于45分钟。

We also can supply active silica powder of every specification, Sediment time not lower than 45 minutes.

youdao