Reversing at least one flow in relation to at least one other flow in a plural- flow engine

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Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto (rocket nozzles F02K9/97) > Nozzles having means for reversing jet thrust (reversing jet thrust using fluid jets F02K1/32) > Reversing at least one flow in relation to at least one other flow in a plural- flow engine