英语语法分析

The paper expounds the controlling methods of steam maintenance temperature for beam slab precasting.

就如何控制梁板预制的蒸气养护温度进行了阐述。

The paper analyzes the factors causing the cracks happened during highway culvert pipe precasting, and brings forward the control measures accordingly.

分析了公路涵管预制裂缝产生的因素，提出了相关的控制措施。

The results and suggestions concluded in this thesis, is good to promote the precasting technology in the design and construction works of railway tunnel.

文中获得的一些结论和建议，对在铁路隧道中推广预制技术是有益的。