import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,29,0))
w1=cq.Workplane('ZX',origin=(0,27,0))
r=w0.sketch().arc((-30,-25),(0,-76),(43,-36)).arc((93,21),(23,-6)).arc((9,-23),(-13,-22)).segment((-8,-29)).segment((-21,-37)).close().assemble().finalize().extrude(-58).union(w1.workplane(offset=-2/2).moveTo(-71,37).box(58,80,2))