import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-100,0))
r=w0.sketch().arc((-63,-62),(-62,-62),(-62,-63)).arc((76,44),(-63,-62)).assemble().finalize().extrude(153).union(w0.sketch().segment((-43,-12),(-19,-12)).arc((7,-35),(33,-12)).segment((57,-12)).segment((57,-6)).segment((33,-6)).arc((7,17),(-19,-6)).segment((-43,-6)).close().assemble().finalize().extrude(200))