The Wanan bridge in Quanzhou of Fujian Province, China's earliest stone beam bridge built on a large scale, occupies an important place in the history of Bridges of China and even of the world.
福建泉州万安桥是中国最早的大型石梁桥，在中国乃至世界桥梁史上占有重要的地位。
As a type of special equipment, the construction of large-scale cranes is very difficult, especially the main beam camber control and the deformation control.
这种大型特种设备建造施工难度大，特别是主梁的上拱度控制、大型箱体结构的变形控制都较一般结构难度大。
In this article, the author points out some important questions about routine management of the crane beam through the assessment on a large-scale factory building's crane beams.
通过对某大型厂房吊车梁的鉴定分析，指出了该类吊车梁在日常管理中应注意的几个问题。
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