Comparing with traditional construction materials, the ceramic grain concrete possesses the advantages of smaller thermal conductivity coefficient, less weighty and better structural performance.

与传统的建筑材料相比，陶粒混凝土具有导热系数小、重量轻、结构性能好等优点。

youdao

The some techniques of guide shaft and expansion excavation are improved for assure the successful construction and raise the safety coefficient.

为保证施工顺利进行，且提高安全性，对正反导井及扩挖系统进行了多项技术改进，提高了安全系数。

youdao

Torsion moment coefficient is the key parameter for torsion moment-method construction of high strength bolts.

扭矩系数是高强度螺栓扭矩法施工的关键参数。

youdao