import cadquery as cq
w0=cq.Workplane('YZ',origin=(12,0,0))
r=w0.sketch().push([(-3,-16)]).circle(33).circle(28,mode='s').circle(17).finalize().extrude(-62).union(w0.sketch().segment((32,29),(32,45)).segment((36,45)).arc((18,41),(32,29)).assemble().finalize().extrude(38))