Supercharged propeller with high hydrodynamic efficiency
The booster-type thruster comprises a guide pipe, a driving system, a first propeller, a second propeller and a rotating shaft, the driving system is installed on the inner wall of the guide pipe, the first propeller and the second propeller are both rotationally installed on the inner wall of the g...
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Format: | Patent |
Sprache: | chi ; eng |
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