val/13.py

import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,3))
r=w0.sketch().segment((-50,5),(-3,-30)).arc((-2,-31),(-1,-31)).segment((19,-46)).segment((50,-5)).segment((-19,46)).close().assemble().circle(13,mode='s').finalize().extrude(-6)