import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-1,0))
w1=cq.Workplane('XY',origin=(0,0,-19))
r=w0.sketch().arc((-21,36),(-11,3),(-10,38)).arc((-15,35),(-21,36)).assemble().reset().face(w0.sketch().segment((-24,34),(-21,30)).segment((-20,32)).segment((-23,35)).close().assemble(),mode='s').finalize().extrude(-49).union(w0.workplane(offset=51/2).moveTo(-13,21).cylinder(51,25)).union(w1.sketch().push([(-35,30.5)]).rect(22,11).push([(-33,28.5)]).rect(4,1,mode='s').finalize().extrude(57))