import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-8,0))
r=w0.workplane(offset=-13/2).moveTo(-1.5,-29).box(25,42,13).union(w0.sketch().segment((-37,32),(-24,-7)).segment((-33,-7)).segment((-33,-11)).segment((-23,-11)).segment((-21,-16)).segment((-11,-13)).segment((-10,-11)).segment((-15,-11)).segment((-15,-7)).segment((-8,-7)).segment((-7,-3)).segment((-4,-4)).segment((-5,-7)).segment((0,-7)).segment((0,-11)).segment((18,-11)).segment((18,-9)).segment((37,-9)).segment((37,27)).segment((24,27)).segment((16,50)).close().assemble().reset().face(w0.sketch().segment((6,-7),(13,-7)).segment((13,-5)).close().assemble(),mode='s').finalize().extrude(30))