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Unmanned aerial vehicle launching and recovery device
Trolley capable of lowering labor intensity of waist and using method thereof
Traffic intelligent engine system construction method and device based on flow batch integration
Ship with adjustable rolling-reducing wave suppression plate
Ship tilt test pendulum bob reading system and accurate reading method
Restricting driving for better traffic and clearer skies: Did it work in Beijing?
Novel annular propeller structure based on gas-liquid two-phase flow
Launch and withdraw device of unmanned aerial vehicle and method for launch and withdraw device
Flow field characteristics of a two-dimensional moonpool under uniform flow conditions