. . "reaction propulsion"^^ . "propulsion that results from the ejection at high velocity of a mass of gas to which the vehicle reacts with an equal and opposite momentum"@en-us . "0"^^ . . . "reaction propulsion"@en-us . "110756877"@en-us . "111498850"^^ . . "0"^^ . . . "11498850-n"^^ . . .