import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,7,0))
r=w0.workplane(offset=-40/2).moveTo(-11.5,-30).box(57,40,40).union(w0.sketch().segment((11,26),(15,26)).segment((15,22)).segment((40,22)).segment((40,49)).segment((11,49)).close().assemble().finalize().extrude(23)).union(w0.workplane(offset=25/2).moveTo(25,36).cylinder(25,14))