import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,38))
w1=cq.Workplane('YZ',origin=(-18,0,0))
r=w0.sketch().arc((-20,32),(-33,7),(-7,-4)).segment((-3,-8)).segment((3,-4)).arc((18,1),(28,13)).segment((33,18)).segment((28,24)).arc((24,36),(13,43)).segment((8,50)).segment((3,46)).arc((-11,42),(-20,32)).assemble().finalize().extrude(-13).union(w1.sketch().segment((-50,-36),(-41,-36)).arc((-30,-38),(-20,-36)).segment((5,-36)).segment((5,-18)).segment((-4,-18)).segment((-4,-16)).segment((-12,-16)).arc((-30,-1),(-49,-16)).segment((-50,-16)).close().assemble().finalize().extrude(53))