import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,-12))
w1=cq.Workplane('YZ',origin=(14,0,0))
r=w0.sketch().arc((-43,-38),(-22,-50),(0,-38)).close().assemble().reset().face(w0.sketch().segment((-43,-10),(0,-10)).arc((-22,1),(-43,-10)).assemble()).push([(12,27)]).circle(23).circle(9,mode='s').finalize().extrude(8).union(w1.sketch().segment((6,-29),(49,-29)).segment((49,-23)).segment((18,-23)).segment((18,26)).segment((49,26)).segment((49,29)).segment((6,29)).close().assemble().finalize().extrude(29))