import cadquery as cq
w0=cq.Workplane('YZ',origin=(-19,0,0))
r=w0.sketch().arc((10,-47),(18,-21),(20,-48)).segment((20,-43)).arc((18,-27),(10,-41)).close().assemble().finalize().extrude(-19).union(w0.sketch().segment((-45,-12),(-41,-12)).segment((-35,-50)).segment((0,-45)).segment((-7,7)).segment((-8,7)).segment((-8,11)).segment((-45,11)).close().assemble().push([(-21,-21)]).circle(12,mode='s').finalize().extrude(2)).union(w0.workplane(offset=58/2).moveTo(23,28.5).box(44,43,58))