import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-41))
r=w0.workplane(offset=1/2).moveTo(-12,-25).cylinder(1,25).union(w0.sketch().arc((-1,26),(37,29),(0,38)).segment((0,26)).close().assemble().push([(18,31)]).rect(34,6,mode='s').finalize().extrude(59)).union(w0.sketch().segment((-1,1),(24,-19)).segment((28,-14)).close().assemble().finalize().extrude(82))