As for the limit bearing capacity formula of the concrete filled steel tube long column subjected to axial compress, we lead to the tangent modulus and the conception of metal material.
在推导钢管混凝土轴心受压长柱临界承载力公式时，论文利用材料的切线模量，分别推导了钢材和混凝土的切线模量公式。
The circular cooling water tube of BF is characterized by the large system, wide-diameter tube, long lines and complicated layout.
高炉循环冷却水管道系统大，管径粗，管线长，布置错综复杂。
The circular cooling water tube of BF is characterized by the large system, wide-diameter tube, long lines and complicated layout.
高炉循环冷却水管道系统大，管径粗，管线长，布置错综复杂。
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