import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,-100,0))
r=w0.workplane(offset=195/2).box(174,110,195).union(w0.sketch().arc((-44,-20),(43,23),(-42,-25)).segment((-19,-41)).segment((17,9)).segment((-9,28)).close().assemble().finalize().extrude(200))