import cadquery as cq
w0=cq.Workplane('YZ',origin=(-74,0,0))
r=w0.workplane(offset=-15/2).moveTo(18,77).cylinder(15,23).union(w0.sketch().segment((-59,-74),(-45,-99)).segment((-15,-83)).segment((27,-100)).segment((47,-51)).segment((59,-44)).segment((45,-19)).segment((15,-35)).segment((-22,-20)).arc((-25,-21),(-28,-21)).segment((-47,-67)).close().assemble().finalize().extrude(163))