import cadquery as cq
w0=cq.Workplane('YZ',origin=(18,0,0))
r=w0.sketch().segment((32,-31),(32,-28)).arc((21,-48),(36,-31)).segment((35,-31)).close().assemble().reset().face(w0.sketch().segment((17,-40),(22,-40)).segment((29,-50)).segment((36,-45)).segment((32,-40)).segment((33,-40)).segment((33,-35)).segment((29,-35)).segment((28,-35)).segment((17,-35)).close().assemble(),mode='s').finalize().extrude(-37).union(w0.sketch().segment((-38,41),(-29,40)).arc((-33,50),(-38,41)).assemble().push([(-33,44.5)]).rect(8,5,mode='s').finalize().extrude(-27))