import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-11))
w1=cq.Workplane('XY',origin=(0,0,-3))
r=w0.sketch().segment((-1,19),(11,19)).arc((7,24),(11,30)).segment((10,32)).segment((7,31)).segment((8,30)).segment((-1,30)).close().assemble().reset().face(w0.sketch().segment((13,19),(15,16)).segment((17,17)).segment((17,19)).segment((26,19)).segment((26,30)).segment((13,30)).arc((18,24),(13,19)).assemble()).finalize().extrude(39).union(w1.sketch().arc((-10,-12),(-1,-21),(11,-24)).arc((49,-17),(21,10)).arc((8,15),(-5,10)).arc((-50,8),(-10,-12)).assemble().reset().face(w1.sketch().segment((-3,-15),(7,-15)).arc((6,-10),(7,-6)).segment((-3,-6)).close().assemble(),mode='s').finalize().extrude(-25))