With an example,presents in detail the main design technology,treatment of special pipe sections and construction technology.

Application of vertical metal positive-displacement flow meter in special units;

According to the specialty of electronic resource,the article has given a systematical discussion and detailed demonstration of some different special fields between general printed books and electronic resources.

To reduce traffic accidents and improve the antiskid ability at some particular road sections such as entrances and exits of tunnels,continuous curves,large longitudinal slopes and toll-gates, technical standards for different components of thin-layer materials were put forward based on the analysis of curing mechanism for bi-component thin-layer paving material.