... bottom girder 底梁 panel girder 格子梁 plain girder 宽腹梁,实腹梁...
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spatial girder panel structure 空间梁板结构
spatial girder-panel structure 空间梁板结构
spatial girder-panel structural system 空间梁板结构
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
桥式起重机采用工字形截面作为主梁，使用多年后该结构形式的主梁上翼缘板和腹板连接的主焊缝及母材多处产生裂纹，甚至发生主梁断裂事故。
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