发动机缸体

https://youtu.be/YkLKX7l_T4E#curve#intersectioncurve#intersection#3d#3dscratch#inventor#autodesk#app#3d#board#inventors#inventorcad#cadpractice#drawing#drawingptutorial#inventors#autodesk#app#3d#发明#教程#inventorassembly#inventorcead#inventor3d#cad#cadpratic#cadtutorials#grabcad#cadcam#cadcammechanical#cadturials#inventor#autodesk#1pp#cone#平板#板材#金属板#板材折弯#折弯机#板材折弯