import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,18,0))
r=w0.workplane(offset=-44/2).moveTo(19.5,-1).box(41,34,44).union(w0.sketch().push([(-26,-36)]).circle(14).circle(7,mode='s').finalize().extrude(-39)).union(w0.sketch().segment((-12,37),(-3,37)).segment((-3,29)).segment((2,29)).segment((2,37)).segment((11,37)).segment((6,41)).segment((2,41)).segment((2,50)).segment((-3,50)).segment((-3,41)).segment((-12,41)).close().assemble().finalize().extrude(8))