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import cadquery as cq
w0=cq.Workplane('XY',origin=(0,0,56))
r=w0.sketch().arc((-55,21),(-75,-29),(-28,-54)).arc((95,33),(-55,21)).assemble().reset().face(w0.sketch().segment((15,-41),(21,-66)).segment((45,-61)).segment((39,-36)).close().assemble(),mode='s').finalize().extrude(-111).union(w0.workplane(offset=-95/2).moveTo(-37,-15).box(126,138,95))