| import cadquery as cq | |
| w0=cq.Workplane('XY',origin=(0,0,-28)) | |
| r=w0.workplane(offset=-4/2).moveTo(-21,-20).box(58,26,4).union(w0.sketch().segment((0,-1),(50,-1)).segment((50,24)).segment((0,24)).segment((0,22)).arc((-39,13),(0,4)).close().assemble().finalize().extrude(60)) |