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import cadquery as cq
w0=cq.Workplane('YZ',origin=(23,0,0))
w1=cq.Workplane('XY',origin=(0,0,34))
r=w0.sketch().push([(0,-45)]).circle(55).circle(46,mode='s').finalize().extrude(-10).union(w1.sketch().segment((4,-43),(23,-43)).arc((14,-21),(30,-4)).arc((-21,25),(4,-28)).close().assemble().finalize().extrude(66))