import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-2,0))
r=w0.workplane(offset=-48/2).moveTo(-11.5,-29.5).box(49,9,48).union(w0.workplane(offset=-8/2).moveTo(32,30).cylinder(8,3)).union(w0.workplane(offset=52/2).moveTo(32,30).cylinder(52,4))