import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,4))
r=w0.sketch().segment((1,-50),(3,-50)).segment((3,-1)).segment((1,-1)).segment((1,-7)).arc((-14,-26),(1,-44)).close().assemble().finalize().extrude(-53).union(w0.sketch().arc((-6,26),(-46,1),(1,-2)).segment((35,-2)).segment((35,50)).segment((-6,50)).close().assemble().finalize().extrude(-31)).union(w0.workplane(offset=44/2).moveTo(37,-35).cylinder(44,10))