import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,55,0))
w1=cq.Workplane('ZX',origin=(0,-12,0))
r=w0.sketch().arc((-15,-94),(-6,-76),(-4,-56)).close().assemble().finalize().extrude(45).union(w1.sketch().arc((-63,39),(-76,-13),(-29,-40)).arc((73,49),(-63,39)).assemble().finalize().extrude(-88))