Analyzed press technology characteristics of vent - windows of the car side board, designed a lancing - drawing compound die.分析了车厢侧板零件通风窗冲压加工的工艺特点, 设计了一副针对该零件加工的切口拉伸复合模....
Bernstein's compositions spanned all aspects of music, from symphonies to musicals.伯恩斯坦创作的乐曲涉及了从交响乐到音乐剧等音乐的各个方面。In order to represent Archimedes helix with control polygon, we construct Bernstein - like basis.为了用控制多...