import cadquery as cq
w0=cq.Workplane('YZ',origin=(22,0,0))
w1=cq.Workplane('YZ',origin=(30,0,0))
r=w0.workplane(offset=-52/2).moveTo(20,39).cylinder(52,7).union(w0.workplane(offset=-7/2).moveTo(0,-29.5).box(60,41,7)).union(w1.workplane(offset=-17/2).moveTo(0.5,38.5).box(3,23,17))