import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,4))
w1=cq.Workplane('YZ',origin=(11,0,0))
r=w0.sketch().segment((-11,25),(-6,24)).segment((-6,30)).segment((-11,30)).close().assemble().finalize().extrude(45).union(w1.sketch().segment((-9,-36),(63,-36)).segment((63,-21)).segment((53,-21)).arc((65,-15),(73,-5)).segment((100,-5)).segment((100,29)).segment((73,29)).arc((44,46),(14,29)).segment((-3,29)).arc((-100,4),(-9,-36)).assemble().reset().face(w1.sketch().segment((1,-21),(35,-21)).arc((23,-15),(14,-5)).segment((5,-5)).arc((4,-13),(1,-21)).assemble(),mode='s').finalize().extrude(-22))