import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-51,0))
r=w0.sketch().segment((-31,-100),(16,-100)).segment((16,20)).arc((20,97),(-31,39)).close().assemble().finalize().extrude(94).union(w0.sketch().arc((4,9),(-39,-50),(31,-30)).arc((28,-4),(4,9)).assemble().finalize().extrude(102))