Battery fixing device, mining dump truck and battery fixing method
POWER ASSEMBLY SUSPENSION SYSTEM, MOUNTING METHOD AND VEHICLE
Rearview mirror bracket fixing device, rearview mirror mounting assembly and mining dump truck
Winch system, water quality analysis system and using method
Unmanned aerial vehicle frame supporting device for unmanned aerial vehicle detection
Microsatellite equipped with green normal-temperature propelling system
Oblique photography platform carried by unmanned aerial vehicle