import cadquery as cq
w0=cq.Workplane('YZ',origin=(4,0,0))
r=w0.workplane(offset=-37/2).moveTo(-16,-24).cylinder(37,11).union(w0.sketch().arc((-16,-34),(-12,-36),(-10,-32)).arc((-7,-28),(-6,-22)).arc((-17,-25),(-9,-17)).arc((-25,-20),(-16,-34)).assemble().finalize().extrude(-4)).union(w0.sketch().segment((-45,-50),(40,-50)).segment((40,-9)).segment((45,-9)).segment((45,50)).segment((28,50)).segment((28,39)).segment((-45,39)).close().assemble().finalize().extrude(29))