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import cadquery as cq
w0=cq.Workplane('YZ',origin=(71,0,0))
w1=cq.Workplane('YZ',origin=(14,0,0))
r=w0.sketch().segment((-84,-57),(-37,-94)).segment((84,57)).segment((37,94)).close().assemble().finalize().extrude(-143).union(w1.sketch().segment((-77,-100),(77,-100)).segment((77,-99)).segment((-11,-99)).segment((-11,-3)).segment((77,-3)).segment((77,100)).segment((-77,100)).close().assemble().finalize().extrude(51))