import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,21,0))
r=w0.workplane(offset=-84/2).moveTo(-50,-37).cylinder(84,14).union(w0.sketch().push([(15,69)]).circle(31).push([(42,-91)]).circle(9).finalize().extrude(-74)).union(w0.workplane(offset=42/2).moveTo(39.5,7.5).box(49,63,42))