...简支梁 扭矩 变形 [gap=278]ular air heating system, crane construction, spreader, hanging point (不确定,专业用语), simple support beam, twisting, deformation ..
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concrete simple support beam 混凝土简支梁
prestressed concrete simple support beam 预应力混凝土简支梁
simple beam support 简支式支承
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