| 摘要 |
<p>995,685. Screw propellers. F. J. LARDNER. May 27, 1964 [May 31, 1963], No. 21793/63. Heading B7V. A propeller blade is reinforced by a heading 4 extending around substantially the whole or at least the major part of the outer edge of the blade, and a rib 2 (or ribs 2<1>, 2<11> in Fig. 4) extending on the leading and/or trailing face 1 of the blade inwardly from the beading substantially radially of the axis of the propeller.</p> |
