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Brake drum heat power generation self-circulation cooling system and cooling method thereof
Pesticide adding device for unmanned aerial vehicle pesticide box
Water pump, spraying system and plant protection unmanned aerial vehicle
Coalmine winch pneumatic type nozzle positioning injection type oil injection device
Aircraft wing device, unmanned aerial vehicle and patrolling bomb
Online monitoring and management equipment for energy storage battery
Heating adjoining pipe system for ship fuel oil lightering pipeline
Hybrid cross-country vehicle engine start-stop control method and device
Pipeline structure facilitating disassembly of ship ballast tank valve
Stone ballast hopper car unloading dust suppression device and stone ballast hopper car
Portable small crane for maintenance of oil tanker valve