20MnSiV Ⅲ级钢筋焊缝和热影响区拉伸脆性断裂的分析
20MnSiV Ⅲ급강근한봉화열영향구랍신취성단렬적분석
An Analysis on Tensile Brittle Fracture of Welding Seam and Heat Affected Area of Steel 20MnSiV Ⅲ Grade Reinforced Bar
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