import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,37))
r=w0.sketch().segment((-37,-39),(37,-39)).segment((37,12)).segment((-18,12)).arc((-27,8),(-37,5)).close().assemble().push([(-6,-2)]).circle(3,mode='s').finalize().extrude(-74).union(w0.sketch().arc((-26,13),(-1,-50),(27,11)).arc((2,50),(-26,13)).assemble().finalize().extrude(-46))