import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,20))
r=w0.sketch().segment((-43,-10),(-15,-50)).segment((-13,-49)).segment((-42,-8)).close().assemble().push([(15.5,33.5)]).rect(55,3).finalize().extrude(-41).union(w0.sketch().push([(1.5,21)]).rect(33,58).push([(8,14)]).circle(4,mode='s').finalize().extrude(-39))