import cadquery as cq
w0=cq.Workplane('YZ',origin=(7,0,0))
w1=cq.Workplane('XY',origin=(0,0,31))
r=w0.sketch().arc((-7,32),(-28,-40),(40,-9)).segment((42,-9)).segment((42,50)).segment((-7,50)).close().assemble().finalize().extrude(-46).union(w1.sketch().push([(6.5,17.5)]).rect(65,5).push([(16.5,17)]).rect(3,2,mode='s').push([(35,19)]).circle(1,mode='s').finalize().extrude(10))