| import cadquery as cq | |
| w0=cq.Workplane('ZX',origin=(0,18,0)) | |
| r=w0.sketch().segment((-50,-36),(-22,-36)).segment((-22,-46)).segment((22,-46)).segment((22,-36)).segment((50,-36)).segment((50,36)).segment((22,36)).segment((22,46)).segment((-22,46)).segment((-22,36)).segment((-50,36)).close().assemble().circle(21,mode='s').finalize().extrude(-36) |