import cadquery as cq
w0=cq.Workplane('YZ',origin=(18,0,0))
w1=cq.Workplane('YZ',origin=(-5,0,0))
r=w0.sketch().push([(-86,39)]).rect(28,14).rect(14,4,mode='s').finalize().extrude(-48).union(w0.workplane(offset=-6/2).moveTo(85,60).cylinder(6,15)).union(w1.workplane(offset=35/2).moveTo(47.5,-40).box(17,70,35))