import cadquery as cq
w0=cq.Workplane('YZ',origin=(-32,0,0))
w1=cq.Workplane('YZ',origin=(-17,0,0))
r=w0.sketch().arc((-29,-7),(-28,-49),(-1,-17)).arc((-5,17),(-29,-7)).assemble().reset().face(w0.sketch().segment((-19,-42),(-13,-47)).segment((-7,-40)).segment((-13,-35)).close().assemble(),mode='s').finalize().extrude(-4).union(w0.sketch().push([(-11.5,-0.5)]).rect(35,35).push([(-11,-1)]).circle(7,mode='s').finalize().extrude(17)).union(w1.sketch().segment((-12,-18),(43,-18)).segment((43,50)).segment((-12,50)).segment((-12,4)).arc((-16,-1),(-12,-5)).close().assemble().finalize().extrude(53))