import cadquery as cq
w0=cq.Workplane('YZ',origin=(23,0,0))
w1=cq.Workplane('XY',origin=(0,0,19))
r=w0.sketch().arc((-18,-4),(4,-50),(20,-1)).arc((-3,49),(-18,-4)).assemble().push([(-1.5,34)]).rect(7,12,mode='s').finalize().extrude(-71).union(w1.workplane(offset=31/2).moveTo(37,-1).cylinder(31,11))