import cadquery as cq
w0=cq.Workplane('YZ',origin=(-18,0,0))
r=w0.sketch().push([(-13.5,-24)]).rect(37,44).push([(-14,-24)]).circle(4,mode='s').finalize().extrude(-23).union(w0.sketch().segment((-42,1),(-10,-9)).segment((-4,12)).arc((-2,16),(-2,20)).segment((5,40)).segment((-27,50)).segment((-33,30)).arc((-35,26),(-36,22)).close().assemble().push([(24,-23)]).circle(18).finalize().extrude(15)).union(w0.sketch().segment((-36,-39),(-16,-50)).segment((-10,-39)).segment((-23,-39)).segment((-23,-32)).segment((-32,-32)).close().assemble().finalize().extrude(59))