import cadquery as cq
w0=cq.Workplane('YZ',origin=(-4,0,0))
w1=cq.Workplane('YZ',origin=(-18,0,0))
r=w0.sketch().arc((-21,8),(-28,-12),(-11,-23)).arc((-11,-35),(-3,-44)).segment((-3,-50)).segment((11,-50)).segment((11,-44)).arc((20,-29),(11,-15)).segment((11,-9)).segment((4,-9)).arc((1,3),(-9,10)).arc((-14,3),(-21,8)).assemble().finalize().extrude(42).union(w1.workplane(offset=-19/2).moveTo(23,34).box(12,32,19))