import cadquery as cq
w0=cq.Workplane('ZX',origin=(0,23,0))
w1=cq.Workplane('ZX',origin=(0,22,0))
r=w0.sketch().arc((8,-24),(8,-22),(9,-23)).arc((3,-15),(8,-24)).assemble().finalize().extrude(-47).union(w0.sketch().push([(44.5,11.5)]).rect(11,27).push([(49,-1.5)]).rect(2,1,mode='s').finalize().extrude(-30)).union(w1.workplane(offset=-28/2).moveTo(-41,-14.5).box(18,19,28))