In commercial transport, road trains consist of a towing unit and one or more attached trailers. These towed units fall into two main categories: trailers and semi-trailers. Understanding the difference between them is essential for logistics planning, vehicle selection, and parts procurement.Core D

Shock absorbers have damping, requiring a certain amount of pressure during compression and a certain amount of tension during stretching. Their main function is to reduce the vibration of the spring, thereby reducing the vibration of the car. The shock absorption system of a car consists of springs and shock absorbers.

After buying a new car, car supplies are definitely indispensable, and reasonable car supplies are also necessary, such as floor mats, which are necessary to keep the floor clean and tidy, and are also easy to take care of. However, some automotive products cannot be used and even have a certain impact on driving safety.

Nowadays, many drivers can only drive away and are not familiar with the functions on the car. Some even cannot understand the basic air conditioning switches, and various comfort configurations, such as seat heating and ventilation.

It is common to have a left turn waiting area, which can be set up at slightly larger intersections. If the left turn is a red light, vehicles turning left at intersections without a waiting area should stop waiting at the stop line in front of the sidewalk. 

Many cars have a common problem of engine oil leakage, which is actually a normal phenomenon. As the car ages, most engines will leak oil, with some leaking earlier and others leaking later. Because the engine is composed of many components, and the entire interior of the engine is filled with oil.