import cadquery as cq
w0=cq.Workplane('YZ',origin=(24,0,0))
r=w0.sketch().segment((-25,-23),(-17,-23)).segment((-17,-10)).arc((13,45),(-25,-5)).close().assemble().finalize().extrude(-53).union(w0.sketch().segment((-28,-18),(-11,-18)).arc((-4,-43),(21,-48)).segment((21,-50)).arc((22,-49),(22,-48)).arc((32,-12),(-5,-9)).arc((-17,-11),(-28,-18)).assemble().finalize().extrude(4))