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Semi-trailer, also known as a semitrailer or semitruck trailer, is a type of trailer that is attached to a semi-truck or tractor-trailer. It is commonly used in the transportation industry to haul goods over long distances.

The semi-trailer is designed to be pulled by a semi-truck, which is a heavy-duty truck with a powerful engine. It does not have a front axle and relies on the tractor unit to provide both power and steering. The semi-trailer is connected to the semi-truck through a fifth wheel coupling, which allows for better maneuverability and weight distribution.

Semi trailer, also known as a semi-trailer, is a truck that is connected to a tractor. It usually consists of one or more axles and several suspensions. Semi trailers can be classified based on their purpose and design features.

1. Flatbed semi-trailer: Flatbed semi-trailer is one of the most common types of Semi trailers. They have a flat platform and are used to transport large and heavy cargo such as steel, lumber, construction materials and large containers. The platform structure of the flatbed semi-trailer makes the loading and unloading of goods more convenient and improves the efficiency of transportation.

2. Box-type semi-trailer: They have a closed box structure that effectively protects cargo from harsh weather conditions and external damage. Box-type semi-trailers are usually used for container transportation between land and sea transportation, and are widely used in the international logistics industry.

3. Refrigerated semi-trailer: Refrigerated semi-trailer is a Semi trailer designed for transporting goods that require a constant temperature environment. They are equipped with refrigeration equipment and thermal insulation structures to keep cargo within specified temperature ranges. Refrigerated semi-trailers are widely used in industries that require strict temperature control, such as food, pharmaceuticals and cosmetics.

4. Oil tank semi-trailers: Oil tank semi-trailers are used to transport various liquid fuels and chemicals. They have special tank structures and sealing systems to ensure no leakage during transportation. Oil tank semi-trailers are widely used in fields such as the petroleum industry and chemical industry.

5. Special semi-trailer:Trailers can be specialized for transporting heavy machinery and equipment, cars, animals, etc. They are designed and equipped according to the special needs of the transported objects to ensure the safety and integrity of the goods.

Powder Tanker Semi-Trailer 35 m3	Sulfuric Acid tank Trailer 21 m3	12.5 Meters Sidewall trailer 45 Tons
Aluminum Fuel Tanker Trailer 35 m3	Aluminum Oil Tanker Trailer 50 m3	Fuel Tanker Semi Trailer 45 m3
40FT 3-axle Flatbed Trailer 30~50 Tons	Lowbed Semi Trailer 40~60 Tons	LPG Tanker Semi Trailer 45 m3