import cadquery as cq
w0=cq.Workplane('YZ',origin=(17,0,0))
w1=cq.Workplane('YZ',origin=(3,0,0))
r=w0.workplane(offset=17/2).moveTo(2,-3.5).box(44,29,17).union(w0.workplane(offset=29/2).moveTo(2,-3).cylinder(29,3)).union(w0.sketch().segment((-16,-15),(-9,-15)).arc((-3,-30),(12,-37)).arc((37,-47),(35,-20)).arc((33,-4),(20,7)).segment((20,9)).segment((-16,9)).close().assemble().push([(-14,-9.5)]).rect(4,3,mode='s').finalize().extrude(30)).union(w1.sketch().push([(-33,40)]).circle(10).circle(1,mode='s').finalize().extrude(-50))