import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,14))
w1=cq.Workplane('XY',origin=(0,0,-9))
r=w0.sketch().arc((-42,-49),(-28,-44),(-30,-30)).arc((-32,-33),(-35,-35)).arc((-34,-39),(-35,-42)).segment((-35,-49)).close().assemble().finalize().extrude(-27).union(w1.sketch().segment((27,-13),(37,-13)).segment((37,5)).arc((42,13),(37,22)).segment((37,50)).segment((27,50)).segment((27,23)).arc((21,13),(27,4)).close().assemble().push([(26,14)]).circle(5,mode='s').finalize().extrude(17))