wherein the crankshaft is eccentrically secured so that a crescent shaped intermediate space is formed between the stator and rotor and that the head portions of the cylinder liners have working faces which in {HEAD ~ the crescent} shaped {TAIL ~ intermediate space} are alternately subjectable to working medium pressure 
wherein the crankshaft is eccentrically secured so that a crescent shaped intermediate space is formed between the stator and rotor and that the head portions of the cylinder liners have working faces which in { HEAD ~ the crescent } shaped { TAIL ~ intermediate space } are alternately subjectable to working medium pressure
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