import cadquery as cq
w0=cq.Workplane('YZ',origin=(-23,0,0))
w1=cq.Workplane('XY',origin=(0,0,-9))
r=w0.workplane(offset=50/2).moveTo(23,-7).cylinder(50,27).union(w0.workplane(offset=54/2).moveTo(3,5).cylinder(54,29)).union(w1.sketch().push([(-11,-26.5)]).rect(40,47).push([(-9,-9)]).circle(2,mode='s').finalize().extrude(17))