Zero-order-difference lifting structure for vehicle door glass
Yawing moment suppression method for distributed electric propulsion aircraft
Workshop transfer bracket for over-limit tank body and transfer method of workshop transfer bracket
Wind-proof fixing device for magnetic adsorption type protective tower crane
Whole-wheel uniform oil outlet device and oil outlet control method thereof
Whole-wheel all-round oiling device and oiling method thereof
Wheel set driving system of light rail vehicle, bogie and light rail vehicle
Weighing air flotation device for simulating weightlessness
Water-air amphibious multi-rotor unmanned aerial vehicle