import cadquery as cq
w0=cq.Workplane('YZ',origin=(-19,0,0))
r=w0.sketch().segment((-45,-50),(16,-50)).segment((16,-23)).arc((27,44),(-28,4)).segment((-45,4)).close().assemble().finalize().extrude(6).union(w0.sketch().push([(8,13)]).circle(5).circle(1,mode='s').finalize().extrude(37))