| 摘要 |
<p>634,160. Screw propellers. RIBEIRO, A. F. June 6, 1946, No. 17202. Convention date, April 27. [Class 114] The boss A of flared form carries one or more blades C, which contact the boss through 180 degrees. The fluid thrown radially from the blade is deflected axially to form a jet by a surrounding annular body D.</p> |
