import cadquery as cq
w0=cq.Workplane('YZ',origin=(-22,0,0))
w1=cq.Workplane('YZ',origin=(-1,0,0))
r=w0.workplane(offset=-11/2).moveTo(45.5,2.5).box(9,43,11).union(w0.sketch().push([(-10,18)]).circle(28).circle(20,mode='s').finalize().extrude(20)).union(w1.sketch().arc((-38,-10),(-29,-45),(-34,-9)).segment((-34,-7)).arc((-36,-5),(-38,-5)).close().assemble().finalize().extrude(33))