import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,33))
w1=cq.Workplane('YZ',origin=(15,0,0))
r=w0.workplane(offset=-128/2).moveTo(85,-50).box(30,84,128).union(w1.sketch().segment((59,48),(69,48)).segment((69,47)).segment((74,47)).segment((74,48)).segment((79,48)).arc((55,92),(85,53)).segment((85,78)).segment((74,78)).segment((74,80)).segment((69,80)).segment((69,78)).segment((59,78)).close().assemble().finalize().extrude(-115))