import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-1,0))
w1=cq.Workplane('XY',origin=(0,0,-14))
r=w0.workplane(offset=-25/2).moveTo(43,-30).cylinder(25,7).union(w0.sketch().arc((-50,-4),(-48,-8),(-49,-12)).segment((-49,-13)).arc((-47,-8),(-50,-3)).close().assemble().finalize().extrude(29)).union(w1.sketch().segment((13,-28),(37,-28)).segment((37,-6)).arc((25,-12),(13,-6)).close().assemble().finalize().extrude(-34))