import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-39))
r=w0.sketch().arc((-8,-26),(7,-25),(20,-31)).arc((23,-29),(25,-27)).arc((99,-29),(27,-10)).arc((0,2),(-8,-26)).assemble().finalize().extrude(7).union(w0.workplane(offset=78/2).moveTo(-92.5,51).box(15,20,78))