import cadquery as cq
w0=cq.Workplane('YZ',origin=(-7,0,0))
w1=cq.Workplane('YZ',origin=(1,0,0))
r=w0.workplane(offset=-43/2).cylinder(43,14).union(w0.workplane(offset=14/2).box(62,44,14)).union(w1.workplane(offset=49/2).cylinder(49,19))