import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,28,0))
r=w0.sketch().push([(-21.5,40)]).rect(27,20).push([(-19,41.5)]).rect(14,7,mode='s').finalize().extrude(-56).union(w0.sketch().segment((-41,-44),(-9,-50)).segment((-6,-33)).arc((-8,-25),(-3,-18)).segment((4,19)).segment((-27,25)).close().assemble().push([(-18,-12.5)]).rect(14,37,mode='s').push([(32,-6)]).circle(9).finalize().extrude(-52))