短语词组短语ductile -crack-growth fracture 延性裂纹扩展断裂ductile crack propagation 延性断裂扩展;延性裂纹扩展damage ductile crack 延性裂纹扩展ductile crack initiation 韧性启裂ductile crack extension 延性裂纹扩展Ductile crack growth 塑性裂纹扩展 返回 ductile crack