import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,11))
w1=cq.Workplane('ZX',origin=(0,-3,0))
r=w0.sketch().push([(-22.5,31)]).rect(55,10).reset().face(w0.sketch().segment((15,-36),(40,-36)).segment((40,-32)).arc((28,-35),(15,-32)).close().assemble()).reset().face(w0.sketch().arc((15,13),(28,16),(40,13)).segment((40,18)).segment((15,18)).close().assemble()).finalize().extrude(-60).union(w1.sketch().segment((4,6),(19,6)).segment((19,-4)).segment((49,-4)).segment((49,34)).segment((26,34)).segment((26,50)).segment((4,50)).close().assemble().push([(33.5,15)]).rect(5,24,mode='s').push([(40,5)]).circle(3,mode='s').finalize().extrude(-17))