import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-6))
r=w0.sketch().segment((-4,100),(-1,8)).arc((7,-100),(1,8)).segment((0,100)).close().assemble().finalize().extrude(-13).union(w0.sketch().segment((-19,56),(-11,52)).arc((-6,43),(4,44)).segment((13,40)).segment((17,48)).segment((9,52)).arc((3,61),(-7,60)).segment((-15,64)).close().assemble().push([(-1,52)]).circle(8,mode='s').finalize().extrude(25))