import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,5))
r=w0.sketch().segment((-50,-1),(-47,-17)).segment((-47,-22)).segment((-46,-22)).segment((-46,-29)).segment((-46,-31)).segment((-44,-41)).segment((10,-34)).segment((7,-17)).segment((7,-14)).segment((6,-6)).segment((6,-4)).segment((5,5)).close().assemble().finalize().extrude(-36).union(w0.workplane(offset=-30/2).moveTo(24,12.5).box(6,57,30)).union(w0.sketch().segment((39,0),(50,0)).segment((50,25)).segment((41,25)).close().assemble().finalize().extrude(25))