Semi-trailer truck

Have you ever played with toy cars and trucks, the ones that have a little box attached to the back of the truck that can be detached? A semi-trailer truck is just like that but bigger and made for real stuff, not just toys.

A semi-trailer truck is a very big truck that has two parts, the tractor and trailer. The front part of the truck is called the tractor as it looks like a tractor with a big engine and a driver's cabin. The back part of the truck is called the trailer as it looks like a big box or a platform that carries goods like food, clothing or electronics.

The tractor and trailer part are connected by a device called the fifth wheel. The fifth wheel is a metal piece that pivots and locks in place to connect the tractor and trailer. It looks like a giant circular plate that sits on top of the rear axle of the tractor.

The trailers used in semi-truck are of different types like dry vans, refrigerated trailers or flatbed trailers. Some trailers have moving floors that help to load and unload heavy goods easily.

The semi-trailer trucks are very important in transportation as they can carry a lot of goods. Also, they are very efficient and practical for transportation of big items. However, they are also very powerful, so drivers need to be well trained to handle them safely.

In summary, a semi-trailer truck is just like a big toy truck with a detachable trailer. it's a really big truck that is made for carrying big things from one place to another.