import cadquery as cq
w0=cq.Workplane('YZ',origin=(12,0,0))
r=w0.sketch().push([(24,20)]).circle(26).reset().face(w0.sketch().segment((21,10),(23,10)).segment((26,30)).segment((25,31)).close().assemble(),mode='s').finalize().extrude(-30).union(w0.sketch().segment((-50,-38),(-43,-38)).arc((-28,-46),(-14,-38)).segment((-7,-38)).segment((-7,-20)).segment((-14,-20)).arc((-28,-12),(-43,-20)).segment((-50,-20)).close().assemble().push([(-32,-43)]).circle(1,mode='s').push([(-11,-24)]).rect(8,6,mode='s').finalize().extrude(-9)).union(w0.workplane(offset=6/2).moveTo(-28,-29).cylinder(6,6))