import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,1,0))
r=w0.workplane(offset=-42/2).moveTo(14,-8).cylinder(42,36).union(w0.sketch().arc((-45,29),(-45,-6),(-12,-21)).arc((-3,-4),(15,3)).arc((16,9),(16,16)).segment((17,16)).arc((19,17),(21,16)).segment((22,16)).segment((22,43)).segment((-13,43)).arc((-17,44),(-22,43)).segment((-45,43)).close().assemble().finalize().extrude(39))