双相钢（DP）作为一种先进高强钢，具有强度高、屈强比低、初始加工硬化速率高以及强度和延性匹配好的特点。
As one of advanced high strength steel, dual phase (DP) steel is widely used in producing cars nowadays and in the coming future.
钢-混凝土组合梁具有承载力高、延性好、刚度大、构件截面尺寸小等优点。
Steel-concrete composite beam with high capacity, good ductility, stiffness, member cross-section the advantages of small size.
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