import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,8,0))
w1=cq.Workplane('XY',origin=(0,0,1))
r=w0.sketch().segment((-50,-17),(-45,-17)).segment((-45,-19)).segment((-33,-19)).segment((-33,-17)).segment((-29,-17)).segment((-29,-19)).segment((-18,-19)).segment((-18,-17)).segment((-12,-17)).segment((-12,-12)).segment((-18,-12)).segment((-18,-10)).segment((-29,-10)).segment((-29,-12)).segment((-33,-12)).segment((-33,-10)).segment((-45,-10)).segment((-45,-12)).segment((-50,-12)).close().assemble().push([(-43,14)]).circle(7).push([(3,-5.5)]).rect(10,31).finalize().extrude(-10).union(w1.workplane(offset=49/2).moveTo(-5.5,0).box(3,62,49))