In the destination of pedestrian protection, there is space left in bumper. Variable stiffness structure is put forward combining the characteristics of both expanding and compressing tube.
Combining with the university gymnasium, the deformation of large-span steel tube arch truss during construction is monitored and systematically analysed in this paper.
本文结合某大学体育馆大跨钢管拱桁架结构施工，对其变形进行了监测及系统分析。
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Oxidation factors in annealing of seamless steel tube are analyzed, combining with production practice, some methods have been put forward to decrease oxidation of seamless steel tube.