import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-52))
w1=cq.Workplane('ZX',origin=(0,-3,0))
r=w0.workplane(offset=-4/2).moveTo(34,-39.5).box(38,57,4).union(w0.sketch().push([(-2.5,-62.5)]).rect(73,63).reset().face(w0.sketch().arc((-13,-55),(-14,-69),(-1,-75)).close().assemble(),mode='s').reset().face(w0.sketch().segment((-5,-50),(8,-70)).arc((9,-56),(-5,-50)).assemble(),mode='s').finalize().extrude(9)).union(w0.sketch().arc((17,76),(-30,25),(37,43)).arc((71,86),(17,76)).assemble().push([(15,-53)]).circle(47).push([(39,-58)]).circle(15,mode='s').finalize().extrude(72)).union(w1.sketch().segment((-51,-14),(-46,-14)).arc((50,-48),(-36,8)).segment((-36,18)).segment((-51,18)).close().assemble().push([(4,-25.5)]).rect(88,29,mode='s').finalize().extrude(66))