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NASA Paresev, a Rogallo flexible wing tested by NASA for spacecraft landing research.. The Rogallo wing is a flexible type of wing.In 1948, Francis Rogallo, a NASA engineer, and his wife Gertrude Rogallo, invented a self-inflating flexible wing they called the Parawing, also known after them as the "Rogallo Wing" and flexible wing. [1]
Rollo is the subject of the 17th-century play Rollo Duke of Normandy, also known as The Bloody Brother, written by John Fletcher, Philip Massinger, Ben Jonson, and George Chapman. The similarities to Rollo are slim, as the play draws inspiration from Herodian's account of the rivalry between Emperor Severus's sons, Geta and Antonine.
Rouleaux formation on wet smear. Rouleaux (singular is rouleau) are stacks or aggregations of red blood cells (RBCs) that form because of the unique discoid shape of the cells in vertebrates.
A stack of piano rolls, some in boxes First part of a piano roll for Welte-Mignon, about 1919, with lines for a pianolist, according to the Buffalo Convention. In the early years of player pianos, piano rolls were produced in varying dimensions and formats.