import cadquery as cq
w0=cq.Workplane('YZ',origin=(-9,0,0))
w1=cq.Workplane('ZX',origin=(0,1,0))
r=w0.workplane(offset=34/2).moveTo(43.5,-10.5).box(13,31,34).union(w0.sketch().segment((-50,-16),(-10,-16)).segment((-10,-13)).segment((-2,-13)).segment((-2,-11)).segment((-10,-11)).segment((-10,-2)).segment((-50,-2)).close().assemble().finalize().extrude(37)).union(w1.sketch().segment((8,-12),(16,-12)).segment((16,-27)).arc((25,-13),(8,-12)).assemble().finalize().extrude(22))