import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,72,0))
r=w0.sketch().segment((-55,-93),(-49,-93)).segment((-49,-100)).segment((49,-100)).segment((49,-93)).segment((55,-93)).segment((55,93)).segment((49,93)).segment((49,100)).segment((-49,100)).segment((-49,93)).segment((-55,93)).close().assemble().finalize().extrude(-144)