Hummer means something buzzing, a hummingbird. Hummer became famous in World War I in the Gulf, and Hummer became synonymous with dynamic off-road vehicles.
Precautions:
1908 John Willie bought the off-road vehicle department, 19 12 set up Willis off-road vehicle company to produce Willie knight cars. Most off-road vehicles use drum brakes on the rear wheels, so it is difficult to control the car when reversing downhill. The four-wheel disc brake built into the Hummer axle is very effective whether reversing downhill or driving forward, so the four-wheel disc brake is irreplaceable off-road equipment.