import cadquery as cq
w0=cq.Workplane('YZ',origin=(-3,0,0))
w1=cq.Workplane('YZ',origin=(9,0,0))
r=w0.workplane(offset=12/2).moveTo(-27,0).box(46,14,12).union(w1.workplane(offset=-18/2).moveTo(46,3).cylinder(18,4))