import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-13,0))
w1=cq.Workplane('YZ',origin=(-29,0,0))
r=w0.workplane(offset=3/2).moveTo(-74,68).box(44,64,3).union(w0.sketch().segment((-54,-44),(-53,-43)).segment((-52,-46)).segment((-53,-47)).arc((-25,41),(-54,-44)).assemble().finalize().extrude(9)).union(w1.sketch().segment((-37,-51),(-22,-51)).arc((0,-63),(21,-51)).segment((37,-51)).segment((37,-28)).segment((21,-28)).arc((16,-22),(9,-17)).segment((9,-24)).segment((3,-24)).segment((3,-16)).segment((4,-16)).arc((-11,-18),(-22,-28)).segment((-37,-28)).close().assemble().push([(7,-47)]).circle(2,mode='s').finalize().extrude(-71))