根据某款已有发动机曲轴实物画出的cad图形，其中包括该曲轴上的必须的详细尺寸以及标注，对应的A1图纸框架也附带的有，上传方便以大家学习交流-According to a section of the existing engine crankshaft kind cad drawn graphics, including the necessary details on the size of the crankshaft and the mark, the corresponding A1 drawing frame also comes in there, upload them for those who need it to learn.