The periodic in-service inspection of Section IX of the Boiler Code includes weld repairs in cast metal, and pipe welds.
根据锅炉法典第ix节的要求，在使用过程中需要定期进行检查的内容包括，逐渐金属的焊缝，管道焊缝。
2
In section 3, the author discusses some relationships among the separabilities and the almost periodic and asymptotically almost periodic solutions of almost periodic system.
在§3中，研究一般概周期系统，讨论了其概周期解和渐近概周期解与分离性之间的某些关系。
3
In this, a model based on periodic structure theory is presented, it can take the cross-section deformation into consideration.