n.硅石；矽土
Our company has our own silia stone moutain and silica powder producing plant. 我公司有自己的硅石矿山和硅石粉加工厂。
The government sets up new health standard for respirable silica dust in the air of workplace. 政府出台了新的工作场所空气呼吸性矽尘卫生标准。
