import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-13,0))
r=w0.workplane(offset=-8/2).moveTo(-23,36).cylinder(8,14).union(w0.sketch().arc((-13,17),(-4,12),(5,17)).close().assemble().reset().face(w0.sketch().segment((-13,26),(5,26)).arc((-4,31),(-13,26)).assemble()).reset().face(w0.sketch().segment((3,-41),(24,-50)).segment((37,-19)).segment((16,-10)).close().assemble()).finalize().extrude(34))