import cadquery as cq
w0=cq.Workplane('YZ',origin=(1,0,0))
w1=cq.Workplane('ZX',origin=(0,-50,0))
r=w0.sketch().arc((13,-6),(-39,-61),(35,-47)).segment((100,-46)).segment((99,58)).segment((13,57)).close().assemble().push([(56.5,5.5)]).rect(37,15,mode='s').finalize().extrude(-74).union(w1.sketch().segment((40,3),(45,3)).segment((45,-17)).segment((76,-17)).segment((76,3)).segment((82,3)).segment((82,52)).segment((76,52)).segment((76,73)).segment((45,73)).segment((45,52)).segment((40,52)).close().assemble().push([(69,-4)]).circle(4,mode='s').finalize().extrude(-50))