SectionSize相关论文
In the actual structure,supporting truss is one of the important structure form which consists of a number of bar throug......
为充分挖掘轧机潜力,石横特殊钢厂通过改进孔型设计和工装、设备、电控系统,使小型车间用连铸方坯由120mm×120mm×3020mm......