traversed by the working-fluid substantially axially

Full Title

Non-positive-displacement machines or engines, e.g. steam turbines (wit working-fluid flows in opposite axial directions for balancing axial thrust F01D3/02; with other than pure rotation F01D23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K) > characterised by counter-rotating rotors subjected to same working fluid stream without intermediate stator blades or the like > traversed by the working-fluid substantially axially