import cadquery as cq
w0=cq.Workplane('YZ',origin=(12,0,0))
r=w0.sketch().push([(-35,-9)]).rect(30,26).push([(-41,-13.5)]).rect(12,15,mode='s').finalize().extrude(-38).union(w0.sketch().segment((18,0),(24,-9)).segment((25,-9)).segment((29,-16)).segment((37,4)).segment((39,3)).segment((30,-17)).segment((36,-25)).segment((48,-16)).segment((43,-9)).segment((50,-9)).segment((50,25)).segment((24,25)).segment((24,5)).close().assemble().finalize().extrude(13))