| import cadquery as cq | |
| w0=cq.Workplane('YZ',origin=(-28,0,0)) | |
| r=w0.sketch().segment((-44,-44),(-24,-44)).arc((0,-50),(26,-44)).segment((47,-44)).segment((47,-21)).arc((50,0),(47,21)).segment((47,44)).segment((26,44)).arc((0,50),(-24,44)).segment((-44,44)).segment((-44,21)).arc((-50,0),(-44,-21)).close().assemble().circle(21,mode='s').finalize().extrude(56) |