import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,76,0))
w1=cq.Workplane('ZX',origin=(0,100,0))
r=w0.sketch().arc((-61,7),(16,-55),(50,38)).arc((-1,8),(-61,7)).assemble().finalize().extrude(-176).union(w1.workplane(offset=-91/2).moveTo(0,4).cylinder(91,53))