Meinten Sie:
person:("YU junfeng")
Shock absorbing system and shock absorbing method of unmanned helicopter with water-cooled engine
Vehicle speed limit information determination method and device and storage medium
Longitudinal vibration model and analytic study of submarine propulsion shafting
Heat treatment lifting appliance for automatically injecting cooling liquid into inner cavity
Open wagon with low bearing surface and high unloading rate
Highway-railway dual-purpose mechanical refrigeration van type semitrailer frame
Open wagon capable of being used for container transportation
Opening and closing confirmation device and method for operation bottom door on hopper car
Floor of cargo-carrying vehicle, mounting structure and mounting method of floor
Top lookout type double-layer guard bus for getting on bus in middle