| 摘要 |
<p>758,190. Screw propellers. LOISEAU, J. C. Feb. 17, 1953 [July 9, 1952], No. 4370/53. Class 114. A propeller having the edges of its blades tangential to the boss and these having a conical external form, the apex of which is directed forwardly, has the forward edge of the blades extending beyond the boss 3 to partially close the gap 6 between the boss and the stern post.</p> |
