It is already determined that free silicon dioxide for dust not only is the main causeation for silicosis, but also is the major targets or q.
我国接触二氧化硅粉尘作业人员较多，矽肺病患者数字较大，因此，加强对粉尘中游离二氧化硅含量的检测是一件非常重要和紧迫的工作。
SEM analysis showed that silicon dioxide occupied free space of wood.
SEM分析表明，二氧化硅凝胶存在于木材细胞空隙中。
SEM analysis showed that silicon dioxide occupied free space of wood.
SEM分析表明，二氧化硅凝胶存在于木材细胞空隙中。
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