| 摘要 |
<p>A drive motor (3) has a driven shaft (4) with a propeller (5) having torque-proof fittings and propeller blades (6). A casing (2) has an inflow opening (20) at its rear end and an outflow opening (14) on-axis at its front end. The propeller blades fit near the outflow opening and a small gap (S) against the casing's pear-shaped inner wall (12).</p> |
