import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-21))
r=w0.sketch().segment((-24,22),(2,-45)).segment((44,-28)).segment((44,-44)).segment((70,-44)).segment((70,2)).segment((49,2)).segment((32,45)).close().assemble().finalize().extrude(-79).union(w0.sketch().segment((-70,2),(-21,2)).segment((-21,-6)).segment((56,-6)).segment((56,7)).segment((20,7)).segment((20,38)).segment((-70,38)).close().assemble().finalize().extrude(-8)).union(w0.sketch().push([(17,0)]).circle(4).push([(19,1)]).circle(2,mode='s').finalize().extrude(121))