Transportation device and transportation method for large-size rock mass sample test
Retractable strong wind vibration reduction mooring rod for fixing helicopter rotor
Fiber sling device for radar scattering cross section test
Carbon dioxide heat pump air conditioner control method and system
Vehicle endurance mileage estimation method and system, storage medium and equipment
Mounting and adjusting device for horizontal steering gear of full-load passenger car
Cross-river channel steel box girder inverted hole erection construction method
Bend self-adaptive water jet steel rail grinding system and operation method thereof