import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,13))
r=w0.workplane(offset=-27/2).moveTo(-22,29).box(56,16,27).union(w0.sketch().segment((-29,17),(-24,17)).segment((-24,20)).arc((-17,37),(-29,23)).close().assemble().push([(-26.5,22.5)]).rect(5,3,mode='s').push([(-19,25)]).circle(2,mode='s').finalize().extrude(-19)).union(w0.sketch().segment((35,-28),(41,-38)).segment((50,-33)).segment((44,-23)).close().assemble().finalize().extrude(-19))