import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-19,0))
r=w0.sketch().segment((12,-50),(31,-50)).segment((31,-37)).segment((26,-40)).segment((12,-19)).close().assemble().reset().face(w0.sketch().segment((12,-16),(17,-12)).segment((31,-33)).segment((31,-2)).segment((12,-2)).close().assemble()).push([(26,21)]).circle(4).finalize().extrude(-17).union(w0.sketch().segment((-31,32),(-28,31)).arc((-11,6),(15,20)).segment((25,17)).segment((26,19)).segment((16,22)).arc((0,49),(-27,33)).segment((-31,34)).close().assemble().push([(-16,31)]).circle(6,mode='s').finalize().extrude(55))