import cadquery as cq
w0=cq.Workplane('YZ',origin=(5,0,0))
w1=cq.Workplane('XY',origin=(0,0,-4))
r=w0.workplane(offset=-25/2).moveTo(7.5,-33).box(49,34,25).union(w0.sketch().segment((14,7),(22,7)).segment((22,22)).segment((18,22)).arc((-35,28),(14,9)).close().assemble().push([(-9,22)]).circle(20,mode='s').push([(34,-5)]).rect(4,40).push([(34,-6)]).circle(2,mode='s').finalize().extrude(-25)).union(w1.sketch().arc((18,-28),(20,-21),(18,-14)).close().assemble().finalize().extrude(33))