import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,2,0))
r=w0.sketch().push([(3.5,-24.5)]).rect(45,51).reset().face(w0.sketch().arc((16,-30),(21,-25),(16,-19)).arc((-10,-24),(16,-30)).assemble(),mode='s').push([(23,-32)]).circle(2,mode='s').finalize().extrude(-17).union(w0.sketch().push([(-36,-9)]).rect(10,38).reset().face(w0.sketch().segment((1,-18),(7,-18)).segment((7,-20)).segment((41,-20)).segment((41,0)).segment((20,0)).segment((20,2)).segment((32,2)).segment((32,50)).segment((18,50)).segment((18,18)).segment((1,18)).segment((1,1)).arc((-28,-3),(1,-8)).close().assemble()).reset().face(w0.sketch().segment((18,2),(18,3)).arc((3,-3),(19,2)).close().assemble(),mode='s').finalize().extrude(13))