import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,41,0))
r=w0.sketch().segment((-49,-50),(36,-50)).segment((36,20)).arc((37,24),(36,28)).segment((36,32)).arc((47,46),(30,39)).segment((-49,39)).close().assemble().finalize().extrude(-82)