The chemical contents in the sand quartz has reached national standards of silicon raw material for plate glass production after combined treating by magnetic separation plus diluted acid dipping.
采用磁选分离法+稀酸浸泡法联合处理后，使该地石英砂的化学成分达到了优质的生产平板玻璃用硅质原料的国家标准。
Structural main beam: steel plate cold bending U type groove plus middle vertical rib plate combination.
结构 主梁：钢板冷弯U型槽加中幅立筋板组合。
There is a large area of tropical forest, a variety of evergreen plants, plus many special biological phenomena, such as plate-like roots, blossoms on old stems and so on.
这里有大片的热带森林，植物种类繁多，终年常绿。另外还有许多独特的生物现象，如板状根、老茎生花等。
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