import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,63))
w1=cq.Workplane('ZX',origin=(0,-43,0))
r=w0.workplane(offset=35/2).moveTo(52.5,60).box(45,64,35).union(w0.sketch().segment((-59,-74),(-59,-8)).arc((-98,-58),(-43,-89)).segment((-52,-89)).segment((-52,-74)).close().assemble().finalize().extrude(37)).union(w1.sketch().arc((-51,70),(-83,-28),(14,7)).arc((27,85),(-51,70)).assemble().push([(-43,13)]).circle(57,mode='s').reset().face(w1.sketch().arc((-21,66),(-3,54),(9,37)).arc((8,66),(-21,66)).assemble(),mode='s').finalize().extrude(-31))