import cadquery as cq
w0=cq.Workplane('YZ',origin=(5,0,0))
r=w0.sketch().segment((-50,-39),(-43,-42)).segment((-30,-8)).segment((-37,-6)).close().assemble().reset().face(w0.sketch().segment((-4,-13),(32,-13)).segment((32,14)).segment((50,14)).segment((50,30)).segment((45,30)).arc((33,42),(22,30)).segment((15,30)).segment((15,29)).segment((-4,29)).close().assemble()).finalize().extrude(-28).union(w0.sketch().segment((26,36),(27,15)).arc((29,26),(26,36)).assemble().finalize().extrude(18))