As we all know, any man-made aircraft has a process of lifting off the ground, and most aircraft have landing or recycling stages, except for single-use rocket missiles and spacecraft that do not need to be recycled. For the aircraft, the device that implements this flight landing function is mainly the landing gear.
The landing gear is the device used to support the aircraft's gravity and bear the corresponding load when the aircraft is parked on the ground, taxied, and taken off the landing. Simply put, the landing gear is a bit like a car's wheel, but it's more complex than a car's wheels, and it's much more powerful. It can consume and absorb the impact energy of the airplane when it landed.