Silica fume: A by-product of the production of silicon and ferrosilicon alloys.Impure water used to make concrete can cause problems, when setting, or in causing premature failure of the structure.

• 常高新承担新北区内市政道路、桥梁、地下管网、绿化等基础设施的建设及经营项目，以及新北区开发土地的“七通一平”工作。