Răspuns :
Trucks are usually used in the industrial businesses, they help with the transport of various goods from different companies, increasing their sales and productions.
Let's take a look at a few truck manufacturing companies such as: Scania, Man, Kenworth, Peterbilt and other companies such as Volvo, Mercedes, Renault etc. where they produce other types of vehicles aswell.
The base of the truck is simple to understand, it has the cabin, which is a large area where you can find the front seats such as the driver seat, behind those you can find addons which will help truck drivers in their long-term trips such as a mini-refrigerator, a bed, etc.
Now, to transport goods using a truck this size, you'll need to attach a trailer, and where do you do that? A chassis of course, you have to attach the trailer in the truck's chassis which is basically the back side of the truck.
European and American trucks are different from each other, their design, and even power, European trucks have a gear up to 12 speeds, while the american haulers have around 16-18 speeds, but both of them, are really powerful because each delivery can consists in around 10 to more than 25 tons.