Many rotor crafts of five -pointed star type
The utility model discloses a many rotor crafts of five -pointed star type, including five -pointed star type fuselage, five -pointed star type fuselage passes through threaded connection by last casing and casing down and constitutes, goes up casing and the internal spiral shell rasp bar that all i...
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Format: | Patent |
Sprache: | chi ; eng |
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