import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-17))
w1=cq.Workplane('XY',origin=(0,0,-13))
r=w0.sketch().segment((-43,18),(-28,18)).arc((22,26),(-29,24)).segment((-43,24)).close().assemble().finalize().extrude(-24).union(w0.workplane(offset=14/2).moveTo(-20,21).cylinder(14,4)).union(w1.workplane(offset=53/2).moveTo(34.5,-31).box(17,38,53))