import cadquery as cq
w0=cq.Workplane('YZ',origin=(1,0,0))
r=w0.sketch().segment((-12,8),(-6,4)).segment((-6,-22)).segment((31,-22)).segment((38,-26)).segment((41,-22)).segment((44,-22)).segment((44,-17)).segment((50,-8)).segment((44,-4)).segment((44,22)).segment((7,22)).segment((1,26)).segment((-3,22)).segment((-6,22)).segment((-6,17)).close().assemble().finalize().extrude(-20).union(w0.sketch().segment((-50,-23),(-28,-23)).segment((-28,-12)).arc((-5,-20),(6,1)).arc((2,6),(0,11)).arc((-23,12),(-28,-11)).segment((-50,-11)).close().assemble().push([(-46,-15)]).circle(3,mode='s').finalize().extrude(17))