import cadquery as cq
w0=cq.Workplane('YZ',origin=(23,0,0))
w1=cq.Workplane('YZ',origin=(21,0,0))
r=w0.sketch().segment((5,-30),(6,-30)).segment((6,-50)).segment((42,-50)).segment((42,-13)).segment((15,-13)).arc((-25,45),(6,-18)).segment((6,-29)).segment((5,-29)).close().assemble().reset().face(w0.sketch().segment((8,-31),(9,-31)).segment((8,-30)).close().assemble(),mode='s').reset().face(w0.sketch().segment((8,-29),(9,-30)).segment((9,-29)).close().assemble(),mode='s').push([(24,-31)]).rect(14,22,mode='s').finalize().extrude(-13).union(w1.sketch().push([(24,-31)]).circle(15).circle(12,mode='s').finalize().extrude(-45))