import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,13,0))
r=w0.workplane(offset=-26/2).moveTo(1.5,-32.5).box(97,7,26).union(w0.sketch().arc((-50,-10),(-48,-5),(-45,1)).arc((-46,13),(-34,14)).arc((-31,16),(-29,17)).segment((-29,36)).segment((-50,36)).close().assemble().finalize().extrude(-9))