import cadquery as cq
w0=cq.Workplane('YZ',origin=(-29,0,0))
w1=cq.Workplane('ZX',origin=(0,8,0))
r=w0.workplane(offset=-21/2).cylinder(21,36).union(w0.sketch().arc((24,22),(-32,-7),(32,-10)).arc((11,2),(24,22)).assemble().push([(10,-15)]).rect(2,16,mode='s').finalize().extrude(62)).union(w0.workplane(offset=79/2).cylinder(79,24)).union(w1.workplane(offset=17/2).moveTo(0,-21.5).box(36,21,17))