This paper analyses and calculates the stress of gas pipe system with the Ltype natural compensation of highrise building, and analyses the influencing factor of the length of short arm and obtains the conclusion that is very easy for reference by designer.

The characteristics and main functional modules of the computing software for compensation stress of steam pipeline which is suitable for natural compensation and square compensator are introduced.

There are many factors of the exhaust of nature that affect the economy of oil storage, these factors include qualitative ones and quantitative ones and each of them is hard to describe accurately, so the process of evaluation is fuzzy.

This paper expounds the factors causing the damage of ancient paper literatures,and probes into the damage of ancient paper literatures from natural damage.